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<a name="creal_002c-crealf_002c-creall_002d_002d_002dreal-part"></a>
<h3 class="section">2.18 <code>creal</code>, <code>crealf</code>, <code>creall</code>&mdash;real part</h3>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;complex.h&gt;
double creal(double complex <var>z</var>);
float crealf(float complex <var>z</var>);
double long creall(long double complex <var>z</var>);

</pre></div>
<p><strong>Description</strong><br>
These functions compute the real part of <var>z</var>.
</p>
<p><code>crealf</code> is identical to <code>creal</code>, except that it performs
its calculations on <code>float complex</code>.
</p>
<p><code>creall</code> is identical to <code>creal</code>, except that it performs
its calculations on <code>long double complex</code>.
</p>
<br>
<p><strong>Returns</strong><br>
The creal* functions return the real part value.
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<p><strong>Portability</strong><br>
<code>creal</code>, <code>crealf</code> and <code>creall</code> are ISO C99
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