>Return sqrt(ln(4)). </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="a00708.html" title="Include &lt;glm/gtc/constants.hpp&gt; to use the features of this extension. ">GLM_GTC_constants</a> </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga261380796b2cd496f68d2cf1d08b8eb9">&#9670;&nbsp;</a></span>root_pi()</h2>

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