<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Absolute value</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.math.html">Math Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.acos.html">acos</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.abs" class="refentry"> <div class="refnamediv"> <h1 class="refname">abs</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">abs</span> — <span class="dc-title">Absolute value</span></p> </div> <div class="refsect1 description" id="refsect1-function.abs-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.number" class="type number">number</a></span> <span class="methodname"><strong>abs</strong></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$number</code></span> )</div> <p class="para rdfs-comment"> Returns the absolute value of <em><code class="parameter">number</code></em>. </p> </div> <div class="refsect1 parameters" id="refsect1-function.abs-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">number</code></em></span> <dd> <p class="para"> The numeric value to process </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.abs-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The absolute value of <em><code class="parameter">number</code></em>. If the argument <em><code class="parameter">number</code></em> is of type <span class="type"><a href="language.types.float.html" class="type float">float</a></span>, the return type is also <span class="type"><a href="language.types.float.html" class="type float">float</a></span>, otherwise it is <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> (as <span class="type"><a href="language.types.float.html" class="type float">float</a></span> usually has a bigger value range than <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>). </p> </div> <div class="refsect1 examples" id="refsect1-function.abs-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-3447"> <p><strong>Example #1 <span class="function"><strong>abs()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$abs </span><span style="color: #007700">= </span><span style="color: #0000BB">abs</span><span style="color: #007700">(-</span><span style="color: #0000BB">4.2</span><span style="color: #007700">); </span><span style="color: #FF8000">// $abs = 4.2; (double/float)<br /></span><span style="color: #0000BB">$abs2 </span><span style="color: #007700">= </span><span style="color: #0000BB">abs</span><span style="color: #007700">(</span><span style="color: #0000BB">5</span><span style="color: #007700">); </span><span style="color: #FF8000">// $abs2 = 5; (integer)<br /></span><span style="color: #0000BB">$abs3 </span><span style="color: #007700">= </span><span style="color: #0000BB">abs</span><span style="color: #007700">(-</span><span style="color: #0000BB">5</span><span style="color: #007700">); </span><span style="color: #FF8000">// $abs3 = 5; (integer)<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.abs-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.gmp-abs.html" class="function" rel="rdfs-seeAlso">gmp_abs()</a> - Absolute value</span></li> <li class="member"> <span class="function"><a href="function.gmp-sign.html" class="function" rel="rdfs-seeAlso">gmp_sign()</a> - Sign of number</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.math.html">Math Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.acos.html">acos</a></div> <div class="up"><a href="ref.math.html">Math Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>