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<a name="cabs_002c-cabsf_002c-cabsl_002d_002d_002dcomplex-absolute_002dvalue"></a>
<h3 class="section">2.1 <code>cabs</code>, <code>cabsf</code>, <code>cabsl</code>&mdash;complex absolute-value</h3>
<a name="index-cabs"></a>
<a name="index-cabsf"></a>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;complex.h&gt;
double cabs(double complex <var>z</var>);
float cabsf(float complex <var>z</var>);
long double cabsl(long double complex <var>z</var>);

</pre></div>
<p><strong>Description</strong><br>
These functions compute compute the complex absolute value 
(also called norm, modulus, or magnitude) of <var>z</var>. 
</p>
<p><code>cabsf</code> is identical to <code>cabs</code>, except that it performs
its calculations on <code>float complex</code>.
</p>
<p><code>cabsl</code> is identical to <code>cabs</code>, except that it performs
its calculations on <code>long double complex</code>.
</p>
<br>
<p><strong>Returns</strong><br>
The cabs* functions return the complex absolute value.
</p>
<br>
<p><strong>Portability</strong><br>
<code>cabs</code>, <code>cabsf</code> and <code>cabsl</code> are ISO C99
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