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<a name="carg_002c-cargf_002d_002d_002dargument-_0028phase-angle_0029"></a>
<h3 class="section">2.4 <code>carg</code>, <code>cargf</code>&mdash;argument (phase angle)</h3>
<a name="index-carg"></a>
<a name="index-cargf"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;complex.h&gt;
double carg(double complex <var>z</var>);
float cargf(float complex <var>z</var>);

</pre></div>
<p><strong>Description</strong><br>
These functions compute the argument (also called phase angle) 
of <var>z</var>, with a branch cut along the negative real axis.
</p>
<p><code>cargf</code> is identical to <code>carg</code>, except that it performs
its calculations on <code>floats complex</code>.
</p>
<br>
<p><strong>Returns</strong><br>
The carg functions return the value of the argument in the 
interval [-pi, +pi]
</p>
<br>
<p><strong>Portability</strong><br>
<code>carg</code> and <code>cargf</code> are ISO C99
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