# log

Return the natural logarithm of the parameter.

## Declaration

 genType log( genType x );

## Parameters

 x - Specify the value of which to take the natural logarithm.

## Description

log returns the natural logarithm of $x$, i.e. the value $y$ which satisfies $x = e^y$. The result is undefined if $x \leq 0$.

## Version Support

 log (genType) 1.1+