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<h1><math.h>: Mathematics</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga9bf5d952c5c93c70f9e66c9794d406c9">M_E</a> 2.7182818284590452354</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gac5c747ee5bcbe892875672a0b9d8171c">M_LOG2E</a> 1.4426950408889634074</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga9ed2b5582226f3896424ff6d2a3ebb14">M_LOG10E</a> 0.43429448190325182765</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga92428112a5d24721208748774a4f23e6">M_LN2</a> 0.69314718055994530942</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga0a53871497a155afe91424c28a8ec3c4">M_LN10</a> 2.30258509299404568402</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gae71449b1cc6e6250b91f539153a7a0d3">M_PI</a> 3.14159265358979323846</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga958e4508ed28ee5cc04249144312c15f">M_PI_2</a> 1.57079632679489661923</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaeb24420b096a677f3a2dc5a72b36bf22">M_PI_4</a> 0.78539816339744830962</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga08dfac3cca9601a02fc88356cc078e1d">M_1_PI</a> 0.31830988618379067154</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga97f6d6514d3d3dd50c3a2a6d622673db">M_2_PI</a> 0.63661977236758134308</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga631ff334c4a1a6db2e8a7ff4acbe48a5">M_2_SQRTPI</a> 1.12837916709551257390</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga66b3ab30f1332874326ed93969e496e0">M_SQRT2</a> 1.41421356237309504880</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gacdbb2c2f9429f08916f03c8786d2d2d7">M_SQRT1_2</a> 0.70710678118654752440</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga8abfcc76130f3f991d124dd22d7e69bc">NAN</a> __builtin_nan("")</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga956e2723d559858d08644ac99146e910">INFINITY</a> __builtin_inf()</td></tr>
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga542f5e42e0d3b5df63de0e34ec06bb40">cos</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga0838a00d86d5e920c80aa7c7532a5559">fabs</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaefa8edb8c13adf7fb4b6b7dbe7261a24">fmod</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga85861fee92c0904e9bb7a9875ee77579">modf</a> (double __x, double *__iptr)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga46e799ece7e1dd323d22cdb53c81cd73">sin</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gadd1e40e370b2165c186f72ec631b1853">sqrt</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga9dff6efc5e63405ba23afb75eb3e4af0">cbrt</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaa2c2303658b8b2555bc97cce3f806bda">tan</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga0f0bf9ac2651b80846a9d9d89bd4cb85">floor</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga61470611f23ceef5d3e9cf63d84cd8a7">ceil</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga89f0cb053e3cdb0c9c952ef040087c80">frexp</a> (double __x, int *__pexp)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga91643e944a94341bd2a3ed1d3ffbae4f">ldexp</a> (double __x, int __exp)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga4ea549372745dda4018ab4b5a94483a6">exp</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga2ec1caf3ba3b1ba62eccb3eddf029438">cosh</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaae45da8f56ba936dc8624157d1770faa">sinh</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaf4b72825a245b794090135251f0ead22">tanh</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gae9c5790d8a29cbee8f54f8eb522decbc">acos</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga98384ad60834911ec93ac5ae1af4cf0a">asin</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga3abd1a0b68d157914a0ee01acaedfe5e">atan</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga054230cd7e4c12958dbfac75ab6886e5">atan2</a> (double __y, double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga7f7d556ab6b6235777a179647c152126">log</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga3630cb8cef4560cf0d92e82ae05b03f0">log10</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga41b41c307b8f96760e9c0c17180b241b">pow</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga468be9ed380771eca5a18e812b2470d4">isnan</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga18a7409e0b2341afaa41993960961772">isinf</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gad11825ff1d6095a08b193c564d524aef">square</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaaebf29a8e50e6d8f88b6caf697021c86">copysign</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga63fcb86a13cf17110582fd6560fb09dd">fdim</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaf7fbeddc2e7721682e69f59be04ae9d5">fma</a> (double __x, double __y, double __z)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gafd8ab12e9d230e8213ac0c8b77c306d9">fmax</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga577eee92b9969942de4d8d134d37c7b8">fmin</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga36894d73110fda52c84dfc050f1004bb">signbit</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga1883497d16352bd92875499f1b39a4b6">trunc</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gafb997a6a8d6dd0498238098826998aa0">isfinite</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga711412ca8746712e0f19508118bf5154">hypot</a> (double __x, double __y)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga6eb04604d801054c5a2afe195d1dd75d">round</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#gaa759c9a1684b0cf2c4c5d133771192ce">lround</a> (double __x)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__math.html#ga9b995838b7bdd4886549dd7e308d0619">lrint</a> (double __x)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <<a class="code" href="math_8h.html">math.h</a>></span>
</pre></div><p>This header file declares basic mathematics constants and functions.</p>
<dl class="user"><dt><b>Notes:</b></dt><dd><ul>
<li>In order to access the functions delcared herein, it is usually also required to additionally link against the library <code>libm.a</code>. See also the related <a class="el" href="FAQ.html#faq_libm">FAQ entry</a>.</li>
<li>Math functions do not raise exceptions and do not change the <code>errno</code> variable. Therefore the majority of them are declared with const attribute, for better optimization by GCC. </li>
</ul>
</dd></dl>
<hr/><h2>Define Documentation</h2>
<a class="anchor" id="ga956e2723d559858d08644ac99146e910"></a><!-- doxytag: member="math.h::INFINITY" ref="ga956e2723d559858d08644ac99146e910" args="" -->
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<td class="memname">#define INFINITY __builtin_inf()</td>
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<div class="memdoc">
<p>INFINITY constant. </p>
</div>
</div>
<a class="anchor" id="ga08dfac3cca9601a02fc88356cc078e1d"></a><!-- doxytag: member="math.h::M_1_PI" ref="ga08dfac3cca9601a02fc88356cc078e1d" args="" -->
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<td class="memname">#define M_1_PI 0.31830988618379067154</td>
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<div class="memdoc">
<p>The constant <em>1/pi</em>. </p>
</div>
</div>
<a class="anchor" id="ga97f6d6514d3d3dd50c3a2a6d622673db"></a><!-- doxytag: member="math.h::M_2_PI" ref="ga97f6d6514d3d3dd50c3a2a6d622673db" args="" -->
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<td class="memname">#define M_2_PI 0.63661977236758134308</td>
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<div class="memdoc">
<p>The constant <em>2/pi</em>. </p>
</div>
</div>
<a class="anchor" id="ga631ff334c4a1a6db2e8a7ff4acbe48a5"></a><!-- doxytag: member="math.h::M_2_SQRTPI" ref="ga631ff334c4a1a6db2e8a7ff4acbe48a5" args="" -->
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<td class="memname">#define M_2_SQRTPI 1.12837916709551257390</td>
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<div class="memdoc">
<p>The constant <em>2/sqrt</em>(pi). </p>
</div>
</div>
<a class="anchor" id="ga9bf5d952c5c93c70f9e66c9794d406c9"></a><!-- doxytag: member="math.h::M_E" ref="ga9bf5d952c5c93c70f9e66c9794d406c9" args="" -->
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<td class="memname">#define M_E 2.7182818284590452354</td>
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<div class="memdoc">
<p>The constant <em>e</em>. </p>
</div>
</div>
<a class="anchor" id="ga0a53871497a155afe91424c28a8ec3c4"></a><!-- doxytag: member="math.h::M_LN10" ref="ga0a53871497a155afe91424c28a8ec3c4" args="" -->
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<td class="memname">#define M_LN10 2.30258509299404568402</td>
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<div class="memdoc">
<p>The natural logarithm of the 10. </p>
</div>
</div>
<a class="anchor" id="ga92428112a5d24721208748774a4f23e6"></a><!-- doxytag: member="math.h::M_LN2" ref="ga92428112a5d24721208748774a4f23e6" args="" -->
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<td class="memname">#define M_LN2 0.69314718055994530942</td>
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<div class="memdoc">
<p>The natural logarithm of the 2. </p>
</div>
</div>
<a class="anchor" id="ga9ed2b5582226f3896424ff6d2a3ebb14"></a><!-- doxytag: member="math.h::M_LOG10E" ref="ga9ed2b5582226f3896424ff6d2a3ebb14" args="" -->
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<td class="memname">#define M_LOG10E 0.43429448190325182765</td>
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<p>The logarithm of the <em>e</em> to base 10. </p>
</div>
</div>
<a class="anchor" id="gac5c747ee5bcbe892875672a0b9d8171c"></a><!-- doxytag: member="math.h::M_LOG2E" ref="gac5c747ee5bcbe892875672a0b9d8171c" args="" -->
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<td class="memname">#define M_LOG2E 1.4426950408889634074</td>
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<div class="memdoc">
<p>The logarithm of the <em>e</em> to base 2. </p>
</div>
</div>
<a class="anchor" id="gae71449b1cc6e6250b91f539153a7a0d3"></a><!-- doxytag: member="math.h::M_PI" ref="gae71449b1cc6e6250b91f539153a7a0d3" args="" -->
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<td class="memname">#define M_PI 3.14159265358979323846</td>
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<div class="memdoc">
<p>The constant <em>pi</em>. </p>
</div>
</div>
<a class="anchor" id="ga958e4508ed28ee5cc04249144312c15f"></a><!-- doxytag: member="math.h::M_PI_2" ref="ga958e4508ed28ee5cc04249144312c15f" args="" -->
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<td class="memname">#define M_PI_2 1.57079632679489661923</td>
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<div class="memdoc">
<p>The constant <em>pi/2</em>. </p>
</div>
</div>
<a class="anchor" id="gaeb24420b096a677f3a2dc5a72b36bf22"></a><!-- doxytag: member="math.h::M_PI_4" ref="gaeb24420b096a677f3a2dc5a72b36bf22" args="" -->
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<td class="memname">#define M_PI_4 0.78539816339744830962</td>
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<div class="memdoc">
<p>The constant <em>pi/4</em>. </p>
</div>
</div>
<a class="anchor" id="gacdbb2c2f9429f08916f03c8786d2d2d7"></a><!-- doxytag: member="math.h::M_SQRT1_2" ref="gacdbb2c2f9429f08916f03c8786d2d2d7" args="" -->
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<td class="memname">#define M_SQRT1_2 0.70710678118654752440</td>
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</div>
<div class="memdoc">
<p>The constant <em>1/sqrt</em>(2). </p>
</div>
</div>
<a class="anchor" id="ga66b3ab30f1332874326ed93969e496e0"></a><!-- doxytag: member="math.h::M_SQRT2" ref="ga66b3ab30f1332874326ed93969e496e0" args="" -->
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<td class="memname">#define M_SQRT2 1.41421356237309504880</td>
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<p>The square root of 2. </p>
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<a class="anchor" id="ga8abfcc76130f3f991d124dd22d7e69bc"></a><!-- doxytag: member="math.h::NAN" ref="ga8abfcc76130f3f991d124dd22d7e69bc" args="" -->
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<td class="memname">#define NAN __builtin_nan("")</td>
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<p>NAN constant. </p>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gae9c5790d8a29cbee8f54f8eb522decbc"></a><!-- doxytag: member="math.h::acos" ref="gae9c5790d8a29cbee8f54f8eb522decbc" args="(double __x)" -->
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<td class="memname">double acos </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The <a class="el" href="group__avr__math.html#gae9c5790d8a29cbee8f54f8eb522decbc">acos()</a> function computes the principal value of the arc cosine of <em>__x</em>. The returned value is in the range [0, pi] radians. A domain error occurs for arguments not in the range [-1, +1]. </p>
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<a class="anchor" id="ga98384ad60834911ec93ac5ae1af4cf0a"></a><!-- doxytag: member="math.h::asin" ref="ga98384ad60834911ec93ac5ae1af4cf0a" args="(double __x)" -->
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<td class="memname">double asin </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The <a class="el" href="group__avr__math.html#ga98384ad60834911ec93ac5ae1af4cf0a">asin()</a> function computes the principal value of the arc sine of <em>__x</em>. The returned value is in the range [-pi/2, pi/2] radians. A domain error occurs for arguments not in the range [-1, +1]. </p>
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<a class="anchor" id="ga3abd1a0b68d157914a0ee01acaedfe5e"></a><!-- doxytag: member="math.h::atan" ref="ga3abd1a0b68d157914a0ee01acaedfe5e" args="(double __x)" -->
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<td class="memname">double atan </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The <a class="el" href="group__avr__math.html#ga3abd1a0b68d157914a0ee01acaedfe5e">atan()</a> function computes the principal value of the arc tangent of <em>__x</em>. The returned value is in the range [-pi/2, pi/2] radians. </p>
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<a class="anchor" id="ga054230cd7e4c12958dbfac75ab6886e5"></a><!-- doxytag: member="math.h::atan2" ref="ga054230cd7e4c12958dbfac75ab6886e5" args="(double __y, double __x)" -->
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<td class="memname">double atan2 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>The <a class="el" href="group__avr__math.html#ga054230cd7e4c12958dbfac75ab6886e5">atan2()</a> function computes the principal value of the arc tangent of <em>__y / __x</em>, using the signs of both arguments to determine the quadrant of the return value. The returned value is in the range [-pi, +pi] radians. </p>
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<a class="anchor" id="ga9dff6efc5e63405ba23afb75eb3e4af0"></a><!-- doxytag: member="math.h::cbrt" ref="ga9dff6efc5e63405ba23afb75eb3e4af0" args="(double __x)" -->
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<td class="memname">double cbrt </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The <a class="el" href="group__avr__math.html#ga9dff6efc5e63405ba23afb75eb3e4af0">cbrt()</a> function returns the cube root of <em>__x</em>. </p>
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<a class="anchor" id="ga61470611f23ceef5d3e9cf63d84cd8a7"></a><!-- doxytag: member="math.h::ceil" ref="ga61470611f23ceef5d3e9cf63d84cd8a7" args="(double __x)" -->
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<td class="memname">double ceil </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The <a class="el" href="group__avr__math.html#ga61470611f23ceef5d3e9cf63d84cd8a7">ceil()</a> function returns the smallest integral value greater than or equal to <em>__x</em>, expressed as a floating-point number. </p>
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<a class="anchor" id="gaaebf29a8e50e6d8f88b6caf697021c86"></a><!-- doxytag: member="math.h::copysign" ref="gaaebf29a8e50e6d8f88b6caf697021c86" args="(double __x, double __y)" -->
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<td class="memname">static double copysign </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [static]</code></td>
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<p>The <a class="el" href="group__avr__math.html#gaaebf29a8e50e6d8f88b6caf697021c86">copysign()</a> function returns <em>__x</em> but with the sign of <em>__y</em>. They work even if <em>__x</em> or <em>__y</em> are NaN or zero. </p>
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<a class="anchor" id="ga542f5e42e0d3b5df63de0e34ec06bb40"></a><!-- doxytag: member="math.h::cos" ref="ga542f5e42e0d3b5df63de0e34ec06bb40" args="(double __x)" -->
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<td class="memname">double cos </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
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<p>The <a class="el" href="group__avr__math.html#ga542f5e42e0d3b5df63de0e34ec06bb40">cos()</a> function returns the cosine of <em>__x</em>, measured in radians. </p>
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<a class="anchor" id="ga2ec1caf3ba3b1ba62eccb3eddf029438"></a><!-- doxytag: member="math.h::cosh" ref="ga2ec1caf3ba3b1ba62eccb3eddf029438" args="(double __x)" -->
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<td class="memname">double cosh </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
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<p>The <a class="el" href="group__avr__math.html#ga2ec1caf3ba3b1ba62eccb3eddf029438">cosh()</a> function returns the hyperbolic cosine of <em>__x</em>. </p>
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<a class="anchor" id="ga4ea549372745dda4018ab4b5a94483a6"></a><!-- doxytag: member="math.h::exp" ref="ga4ea549372745dda4018ab4b5a94483a6" args="(double __x)" -->
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<td class="memname">double exp </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
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<p>The <a class="el" href="group__avr__math.html#ga4ea549372745dda4018ab4b5a94483a6">exp()</a> function returns the exponential value of <em>__x</em>. </p>
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<a class="anchor" id="ga0838a00d86d5e920c80aa7c7532a5559"></a><!-- doxytag: member="math.h::fabs" ref="ga0838a00d86d5e920c80aa7c7532a5559" args="(double __x)" -->
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<td class="memname">double fabs </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
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<p>The <a class="el" href="group__avr__math.html#ga0838a00d86d5e920c80aa7c7532a5559">fabs()</a> function computes the absolute value of a floating-point number <em>__x</em>. </p>
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<a class="anchor" id="ga63fcb86a13cf17110582fd6560fb09dd"></a><!-- doxytag: member="math.h::fdim" ref="ga63fcb86a13cf17110582fd6560fb09dd" args="(double __x, double __y)" -->
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<td class="memname">double fdim </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em></td><td> </td>
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<td>)</td>
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<p>The <a class="el" href="group__avr__math.html#ga63fcb86a13cf17110582fd6560fb09dd">fdim()</a> function returns <em>max(__x - __y, 0)</em>. If <em>__x</em> or <em>__y</em> or both are NaN, NaN is returned. </p>
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<a class="anchor" id="ga0f0bf9ac2651b80846a9d9d89bd4cb85"></a><!-- doxytag: member="math.h::floor" ref="ga0f0bf9ac2651b80846a9d9d89bd4cb85" args="(double __x)" -->
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<td class="memname">double floor </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
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<p>The <a class="el" href="group__avr__math.html#ga0f0bf9ac2651b80846a9d9d89bd4cb85">floor()</a> function returns the largest integral value less than or equal to <em>__x</em>, expressed as a floating-point number. </p>
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<a class="anchor" id="gaf7fbeddc2e7721682e69f59be04ae9d5"></a><!-- doxytag: member="math.h::fma" ref="gaf7fbeddc2e7721682e69f59be04ae9d5" args="(double __x, double __y, double __z)" -->
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<td class="memname">double fma </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em>, </td>
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<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__z</em></td><td> </td>
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<p>The <a class="el" href="group__avr__math.html#gaf7fbeddc2e7721682e69f59be04ae9d5">fma()</a> function performs floating-point multiply-add. This is the operation <em>(__x * __y) + __z</em>, but the intermediate result is not rounded to the destination type. This can sometimes improve the precision of a calculation. </p>
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<a class="anchor" id="gafd8ab12e9d230e8213ac0c8b77c306d9"></a><!-- doxytag: member="math.h::fmax" ref="gafd8ab12e9d230e8213ac0c8b77c306d9" args="(double __x, double __y)" -->
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<td class="memname">double fmax </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em></td><td> </td>
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<p>The <a class="el" href="group__avr__math.html#gafd8ab12e9d230e8213ac0c8b77c306d9">fmax()</a> function returns the greater of the two values <em>__x</em> and <em>__y</em>. If an argument is NaN, the other argument is returned. If both arguments are NaN, NaN is returned. </p>
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<a class="anchor" id="ga577eee92b9969942de4d8d134d37c7b8"></a><!-- doxytag: member="math.h::fmin" ref="ga577eee92b9969942de4d8d134d37c7b8" args="(double __x, double __y)" -->
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<td class="memname">double fmin </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramname"> <em>__y</em></td><td> </td>
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<p>The <a class="el" href="group__avr__math.html#ga577eee92b9969942de4d8d134d37c7b8">fmin()</a> function returns the lesser of the two values <em>__x</em> and <em>__y</em>. If an argument is NaN, the other argument is returned. If both arguments are NaN, NaN is returned. </p>
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<a class="anchor" id="gaefa8edb8c13adf7fb4b6b7dbe7261a24"></a><!-- doxytag: member="math.h::fmod" ref="gaefa8edb8c13adf7fb4b6b7dbe7261a24" args="(double __x, double __y)" -->
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<td class="memname">double fmod </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramname"> <em>__y</em></td><td> </td>
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<td>)</td>
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<p>The function <a class="el" href="group__avr__math.html#gaefa8edb8c13adf7fb4b6b7dbe7261a24">fmod()</a> returns the floating-point remainder of <em>__x / __y</em>. </p>
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<a class="anchor" id="ga89f0cb053e3cdb0c9c952ef040087c80"></a><!-- doxytag: member="math.h::frexp" ref="ga89f0cb053e3cdb0c9c952ef040087c80" args="(double __x, int *__pexp)" -->
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<td class="memname">double frexp </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramtype">int * </td>
<td class="paramname"> <em>__pexp</em></td><td> </td>
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<td>)</td>
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<p>The <a class="el" href="group__avr__math.html#ga89f0cb053e3cdb0c9c952ef040087c80">frexp()</a> function breaks a floating-point number into a normalized fraction and an integral power of 2. It stores the integer in the <code>int</code> object pointed to by <em>__pexp</em>.</p>
<p>If <em>__x</em> is a normal float point number, the <a class="el" href="group__avr__math.html#ga89f0cb053e3cdb0c9c952ef040087c80">frexp()</a> function returns the value <code>v</code>, such that <code>v</code> has a magnitude in the interval [1/2, 1) or zero, and <em>__x</em> equals <code>v</code> times 2 raised to the power <em>__pexp</em>. If <em>__x</em> is zero, both parts of the result are zero. If <em>__x</em> is not a finite number, the <a class="el" href="group__avr__math.html#ga89f0cb053e3cdb0c9c952ef040087c80">frexp()</a> returns <em>__x</em> as is and stores 0 by <em>__pexp</em>.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>This implementation permits a zero pointer as a directive to skip a storing the exponent. </dd></dl>
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<a class="anchor" id="ga711412ca8746712e0f19508118bf5154"></a><!-- doxytag: member="math.h::hypot" ref="ga711412ca8746712e0f19508118bf5154" args="(double __x, double __y)" -->
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<td class="memname">double hypot </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
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<td class="paramname"> <em>__y</em></td><td> </td>
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<td>)</td>
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<p>The <a class="el" href="group__avr__math.html#ga711412ca8746712e0f19508118bf5154">hypot()</a> function returns <em>sqrt(__x*__x + __y*__y)</em>. This is the length of the hypotenuse of a right triangle with sides of length <em>__x</em> and <em>__y</em>, or the distance of the point (<em>__x</em>, <em>__y</em>) from the origin. Using this function instead of the direct formula is wise, since the error is much smaller. No underflow with small <em>__x</em> and <em>__y</em>. No overflow if result is in range. </p>
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<a class="anchor" id="gafb997a6a8d6dd0498238098826998aa0"></a><!-- doxytag: member="math.h::isfinite" ref="gafb997a6a8d6dd0498238098826998aa0" args="(double __x)" -->
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<td class="memname">static int isfinite </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>The <a class="el" href="group__avr__math.html#gafb997a6a8d6dd0498238098826998aa0">isfinite()</a> function returns a nonzero value if <em>__x</em> is finite: not plus or minus infinity, and not NaN. </p>
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<a class="anchor" id="ga18a7409e0b2341afaa41993960961772"></a><!-- doxytag: member="math.h::isinf" ref="ga18a7409e0b2341afaa41993960961772" args="(double __x)" -->
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<td class="memname">int isinf </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
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<p>The function <a class="el" href="group__avr__math.html#ga18a7409e0b2341afaa41993960961772">isinf()</a> returns 1 if the argument <em>__x</em> is positive infinity, -1 if <em>__x</em> is negative infinity, and 0 otherwise.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>The GCC 4.3 can replace this function with inline code that returns the 1 value for both infinities (gcc bug #35509). </dd></dl>
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<a class="anchor" id="ga468be9ed380771eca5a18e812b2470d4"></a><!-- doxytag: member="math.h::isnan" ref="ga468be9ed380771eca5a18e812b2470d4" args="(double __x)" -->
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<td class="memname">int isnan </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The function <a class="el" href="group__avr__math.html#ga468be9ed380771eca5a18e812b2470d4">isnan()</a> returns 1 if the argument <em>__x</em> represents a "not-a-number" (NaN) object, otherwise 0. </p>
</div>
</div>
<a class="anchor" id="ga91643e944a94341bd2a3ed1d3ffbae4f"></a><!-- doxytag: member="math.h::ldexp" ref="ga91643e944a94341bd2a3ed1d3ffbae4f" args="(double __x, int __exp)" -->
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<td class="memname">double ldexp </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>__exp</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga91643e944a94341bd2a3ed1d3ffbae4f">ldexp()</a> function multiplies a floating-point number by an integral power of 2.</p>
<p>The <a class="el" href="group__avr__math.html#ga91643e944a94341bd2a3ed1d3ffbae4f">ldexp()</a> function returns the value of <em>__x</em> times 2 raised to the power <em>__exp</em>. </p>
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</div>
<a class="anchor" id="ga7f7d556ab6b6235777a179647c152126"></a><!-- doxytag: member="math.h::log" ref="ga7f7d556ab6b6235777a179647c152126" args="(double __x)" -->
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<td class="memname">double log </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga7f7d556ab6b6235777a179647c152126">log()</a> function returns the natural logarithm of argument <em>__x</em>. </p>
</div>
</div>
<a class="anchor" id="ga3630cb8cef4560cf0d92e82ae05b03f0"></a><!-- doxytag: member="math.h::log10" ref="ga3630cb8cef4560cf0d92e82ae05b03f0" args="(double __x)" -->
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<td class="memname">double log10 </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga3630cb8cef4560cf0d92e82ae05b03f0">log10()</a> function returns the logarithm of argument <em>__x</em> to base 10. </p>
</div>
</div>
<a class="anchor" id="ga9b995838b7bdd4886549dd7e308d0619"></a><!-- doxytag: member="math.h::lrint" ref="ga9b995838b7bdd4886549dd7e308d0619" args="(double __x)" -->
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<div class="memproto">
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<td class="memname">long lrint </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga9b995838b7bdd4886549dd7e308d0619">lrint()</a> function rounds <em>__x</em> to the nearest integer, rounding the halfway cases to the even integer direction. (That is both 1.5 and 2.5 values are rounded to 2). This function is similar to rint() function, but it differs in type of return value and in that an overflow is possible.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The rounded long integer value. If <em>__x</em> is not a finite number or an overflow was, this realization returns the <code>LONG_MIN</code> value (0x80000000). </dd></dl>
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</div>
<a class="anchor" id="gaa759c9a1684b0cf2c4c5d133771192ce"></a><!-- doxytag: member="math.h::lround" ref="gaa759c9a1684b0cf2c4c5d133771192ce" args="(double __x)" -->
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<td class="memname">long lround </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#gaa759c9a1684b0cf2c4c5d133771192ce">lround()</a> function rounds <em>__x</em> to the nearest integer, but rounds halfway cases away from zero (instead of to the nearest even integer). This function is similar to <a class="el" href="group__avr__math.html#ga6eb04604d801054c5a2afe195d1dd75d">round()</a> function, but it differs in type of return value and in that an overflow is possible.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The rounded long integer value. If <em>__x</em> is not a finite number or an overflow was, this realization returns the <code>LONG_MIN</code> value (0x80000000). </dd></dl>
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</div>
<a class="anchor" id="ga85861fee92c0904e9bb7a9875ee77579"></a><!-- doxytag: member="math.h::modf" ref="ga85861fee92c0904e9bb7a9875ee77579" args="(double __x, double *__iptr)" -->
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<td class="memname">double modf </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>__iptr</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga85861fee92c0904e9bb7a9875ee77579">modf()</a> function breaks the argument <em>__x</em> into integral and fractional parts, each of which has the same sign as the argument. It stores the integral part as a double in the object pointed to by <em>__iptr</em>.</p>
<p>The <a class="el" href="group__avr__math.html#ga85861fee92c0904e9bb7a9875ee77579">modf()</a> function returns the signed fractional part of <em>__x</em>.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>This implementation skips writing by zero pointer. However, the GCC 4.3 can replace this function with inline code that does not permit to use NULL address for the avoiding of storing. </dd></dl>
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</div>
<a class="anchor" id="ga41b41c307b8f96760e9c0c17180b241b"></a><!-- doxytag: member="math.h::pow" ref="ga41b41c307b8f96760e9c0c17180b241b" args="(double __x, double __y)" -->
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<td class="memname">double pow </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__y</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<div class="memdoc">
<p>The function <a class="el" href="group__avr__math.html#ga41b41c307b8f96760e9c0c17180b241b">pow()</a> returns the value of <em>__x</em> to the exponent <em>__y</em>. </p>
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<a class="anchor" id="ga6eb04604d801054c5a2afe195d1dd75d"></a><!-- doxytag: member="math.h::round" ref="ga6eb04604d801054c5a2afe195d1dd75d" args="(double __x)" -->
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<td class="memname">double round </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga6eb04604d801054c5a2afe195d1dd75d">round()</a> function rounds <em>__x</em> to the nearest integer, but rounds halfway cases away from zero (instead of to the nearest even integer). Overflow is impossible.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The rounded value. If <em>__x</em> is an integral or infinite, <em>__x</em> itself is returned. If <em>__x</em> is <code>NaN</code>, then <code>NaN</code> is returned. </dd></dl>
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<a class="anchor" id="ga36894d73110fda52c84dfc050f1004bb"></a><!-- doxytag: member="math.h::signbit" ref="ga36894d73110fda52c84dfc050f1004bb" args="(double __x)" -->
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<td class="memname">int signbit </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga36894d73110fda52c84dfc050f1004bb">signbit()</a> function returns a nonzero value if the value of <em>__x</em> has its sign bit set. This is not the same as `<em>__x</em> < 0.0', because IEEE 754 floating point allows zero to be signed. The comparison `-0.0 < 0.0' is false, but `signbit (-0.0)' will return a nonzero value. </p>
</div>
</div>
<a class="anchor" id="ga46e799ece7e1dd323d22cdb53c81cd73"></a><!-- doxytag: member="math.h::sin" ref="ga46e799ece7e1dd323d22cdb53c81cd73" args="(double __x)" -->
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<td class="memname">double sin </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga46e799ece7e1dd323d22cdb53c81cd73">sin()</a> function returns the sine of <em>__x</em>, measured in radians. </p>
</div>
</div>
<a class="anchor" id="gaae45da8f56ba936dc8624157d1770faa"></a><!-- doxytag: member="math.h::sinh" ref="gaae45da8f56ba936dc8624157d1770faa" args="(double __x)" -->
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<div class="memproto">
<table class="memname">
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<td class="memname">double sinh </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#gaae45da8f56ba936dc8624157d1770faa">sinh()</a> function returns the hyperbolic sine of <em>__x</em>. </p>
</div>
</div>
<a class="anchor" id="gadd1e40e370b2165c186f72ec631b1853"></a><!-- doxytag: member="math.h::sqrt" ref="gadd1e40e370b2165c186f72ec631b1853" args="(double __x)" -->
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<div class="memproto">
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<td class="memname">double sqrt </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#gadd1e40e370b2165c186f72ec631b1853">sqrt()</a> function returns the non-negative square root of <em>__x</em>. </p>
</div>
</div>
<a class="anchor" id="gad11825ff1d6095a08b193c564d524aef"></a><!-- doxytag: member="math.h::square" ref="gad11825ff1d6095a08b193c564d524aef" args="(double __x)" -->
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<td class="memname">double square </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The function <a class="el" href="group__avr__math.html#gad11825ff1d6095a08b193c564d524aef">square()</a> returns <em>__x * __x</em>.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>This function does not belong to the C standard definition. </dd></dl>
</div>
</div>
<a class="anchor" id="gaa2c2303658b8b2555bc97cce3f806bda"></a><!-- doxytag: member="math.h::tan" ref="gaa2c2303658b8b2555bc97cce3f806bda" args="(double __x)" -->
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<td class="memname">double tan </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#gaa2c2303658b8b2555bc97cce3f806bda">tan()</a> function returns the tangent of <em>__x</em>, measured in radians. </p>
</div>
</div>
<a class="anchor" id="gaf4b72825a245b794090135251f0ead22"></a><!-- doxytag: member="math.h::tanh" ref="gaf4b72825a245b794090135251f0ead22" args="(double __x)" -->
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<div class="memproto">
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<td class="memname">double tanh </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#gaf4b72825a245b794090135251f0ead22">tanh()</a> function returns the hyperbolic tangent of <em>__x</em>. </p>
</div>
</div>
<a class="anchor" id="ga1883497d16352bd92875499f1b39a4b6"></a><!-- doxytag: member="math.h::trunc" ref="ga1883497d16352bd92875499f1b39a4b6" args="(double __x)" -->
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<td class="memname">double trunc </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>__x</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>The <a class="el" href="group__avr__math.html#ga1883497d16352bd92875499f1b39a4b6">trunc()</a> function rounds <em>__x</em> to the nearest integer not larger in absolute value. </p>
</div>
</div>
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<p><center>Automatically generated by Doxygen 1.6.1 on 30 Nov 2009.</center></p>
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