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<title>Absolute value</title>
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<h1 class="refname">abs</h1>
<p class="verinfo">(PHP 4, PHP 5, PHP 7)</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 <code class="parameter">number</code>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.abs-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">number</code></dt>
<dd>
<p class="para">
The numeric value to process
</p>
</dd>
</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 <code class="parameter">number</code>. If the
argument <code class="parameter">number</code> 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-4243">
<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 /></span><span style="color: #007700">echo </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">// 4.2 (double/float)<br /></span><span style="color: #007700">echo </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">// 5 (integer)<br /></span><span style="color: #007700">echo </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">// 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>
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