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<a name="cabs"></a>
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<div class="header">
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<p>
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Next: <a href="cacos.html#cacos" accesskey="n" rel="next">cacos</a>, Up: <a href="Complex.html#Complex" accesskey="u" rel="up">Complex</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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<a name="cabs_002c-cabsf_002c-cabsl_002d_002d_002dcomplex-absolute_002dvalue"></a>
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<h3 class="section">2.1 <code>cabs</code>, <code>cabsf</code>, <code>cabsl</code>—complex absolute-value</h3>
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<a name="index-cabs"></a>
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<a name="index-cabsf"></a>
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<a name="index-cabsl"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <complex.h>
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double cabs(double complex <var>z</var>);
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float cabsf(float complex <var>z</var>);
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long double cabsl(long double complex <var>z</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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These functions compute compute the complex absolute value
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(also called norm, modulus, or magnitude) of <var>z</var>.
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</p>
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<p><code>cabsf</code> is identical to <code>cabs</code>, except that it performs
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its calculations on <code>float complex</code>.
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</p>
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<p><code>cabsl</code> is identical to <code>cabs</code>, except that it performs
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its calculations on <code>long double complex</code>.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The cabs* functions return the complex absolute value.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>cabs</code>, <code>cabsf</code> and <code>cabsl</code> are ISO C99
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