ss="keyword">double</span> <span class="identifier">x</span><span class="special">);</span>
</pre>
<p>
      Returns the gamma function of <span class="emphasis"><em>x</em></span>:
    </p>
<p>
      <span class="inlinemediaobject"><img src="../../equations/gamm1.svg"></span>
    </p>
<p>
      See also <a class="link" href="sf_gamma/tgamma.html" title="Gamma">tgamma</a> for the
      full template (header only) version of this function.
    </p>
<pre class="programlisting"><span class="keyword">double</spa