1EXPM1(3)                   Linux Programmer's Manual                  EXPM1(3)
2
3
4

NAME

6       expm1, expm1f, expm1l  - exponential minus 1
7

SYNOPSIS

9       #include <math.h>
10
11       double expm1(double x);
12       float expm1f(float x);
13       long double expm1l(long double x);
14
15       Link with -lm.
16

DESCRIPTION

18       expm1(x) returns a value equivalent to `exp (x) - 1'. It is computed in
19       a way that is accurate even if the value of x is near zero—a case where
20       `exp  (x)  -  1'  would be inaccurate due to subtraction of two numbers
21       that are nearly equal.
22

CONFORMING TO

24       BSD, C99.  The float and long double variants are C99 requirements.
25

SEE ALSO

27       exp(3), log(3), log1p(3)
28
29
30
31                                  2002-07-27                          EXPM1(3)
Impressum