# $EPIC: log_function.txt,v 1.4 2006/08/20 22:36:18 sthalik Exp $
======Synopsis:======
$log_function|log(//<number>//) 

======Technical:======
  * Returns the natural logarithm of //<number>//.
  * If //<number>// is omitted, the empty string is returned.
  * As always, the return value is limited to 6 decimal places.
  * As always, DOM or RANGE means an error occurred.

======Returns:======
The number //X// such that e ** //X// == //<number>//

======History:======