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<a name="creal"></a>
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Next: <a href="csin.html#csin" accesskey="n" rel="next">csin</a>, Previous: <a href="cproj.html#cproj" accesskey="p" rel="prev">cproj</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="creal_002c-crealf_002c-creall_002d_002d_002dreal-part"></a>
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<h3 class="section">2.18 <code>creal</code>, <code>crealf</code>, <code>creall</code>—real part</h3>
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<a name="index-creal"></a>
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<a name="index-crealf"></a>
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<a name="index-creall"></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 creal(double complex <var>z</var>);
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float crealf(float complex <var>z</var>);
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double long creall(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 the real part of <var>z</var>.
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</p>
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<p><code>crealf</code> is identical to <code>creal</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>creall</code> is identical to <code>creal</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 creal* functions return the real part 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>creal</code>, <code>crealf</code> and <code>creall</code> are ISO C99
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