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<a name="pow_002c-powf_002d_002d_002dx-to-the-power-y"></a>
<h3 class="section">1.45 <code>pow</code>, <code>powf</code>&mdash;x to the power y</h3>
<a name="index-pow"></a>
<a name="index-powf"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;math.h&gt;
double pow(double <var>x</var>, double <var>y</var>);
float powf(float <var>x</var>, float <var>y</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>pow</code> and <code>powf</code> calculate <var>x</var> raised to the exponent <var>y</var>.
</p>
<br>
<p><strong>Returns</strong><br>
On success, <code>pow</code> and <code>powf</code> return the value calculated.
</p>
<p>When the argument values would produce overflow, <code>pow</code>
returns <code>HUGE_VAL</code> and set <code>errno</code> to <code>ERANGE</code>.  If the
argument <var>x</var> passed to <code>pow</code> or <code>powf</code> is a negative
noninteger, and <var>y</var> is also not an integer, then <code>errno</code>
is set to <code>EDOM</code>.  If <var>x</var> and <var>y</var> are both 0, then
<code>pow</code> and <code>powf</code> return <code>1</code>.
</p>
<br>
<p><strong>Portability</strong><br>
<code>pow</code> is ANSI C. <code>powf</code> is an extension.  
</p><br>


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