expm1() - math

expm1() returns the equivalent to
   'exp(arg) -  1' computed in a way that is
   accurate even if the value of arg is near zero,
   a case where 'exp (arg) - 1' would be
   inaccurate due to subtraction of two numbers that are nearly equal.

Parameters : 
 arg - The argument to process 

Syntax

float expm1
    ( float $arg
   )

Example

Output / Return Value

Limitations

Alternatives / See Also

Reference