/td><td>)</td>
          <td></td>
        </tr>
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</div><div class="memdoc">

<p>Returns the natural logarithm of v, i.e., returns the value y which satisfies the equation x = e^y. </p>
<p>Results are undefined if v &lt;= 0.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">v</td><td>log function is defined for input values of v defined in the range (0, inf+) in the limit of the type qualifier. </td></tr>
  </table>
  </dd>
</dl>