expm1

EXPM1(3)                   Linux Programmer's Manual                  EXPM1(3)



NAME
       expm1, expm1f, expm1l  - exponential minus 1

SYNOPSIS
       #include <math.h>

       double expm1(double x);

       float expm1f(float x);

       long double expm1l(long double x);


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

CONFORMING TO
       BSD, C99.  The float and the long double variants are C99 requirements.

SEE ALSO
       exp(3), log(3), log1p(3)



                                  2002-07-27                          EXPM1(3)