log1p() - math

log1p() returns log(1 +
   number) computed in a way that is accurate even
   when the value of number is close to zero.
   log() might only return log(1) in this case
   due to lack of precision.

Parameters : 
 number - The argument to process 

Syntax

float log1p
    ( float $number
   )

Example

Output / Return Value

Limitations

Alternatives / See Also

Reference