The LOG function returns a numeric value that approximates the logarithm to the base e (natural log) of argument-1. The type of this function is numeric. 
 
  General Format
 
	  
	  
 
  Arguments
 
	   
	 - Argument-1 must be class numeric. 
	 
- The value of argument-1 must be greater than zero. 
	 
Returned Values
 
	   
	 - The returned value is the approximation of the logarithm to the base e of argument-1. 
	 
- Floating-point format is used for numeric non-integer results.