EXPM1(3) NEWLIB EXPM1(3)NAME
1.17 `expm1', `expm1f'--exponential minus 1
SYNOPSIS
#include <math.h>
double expm1(double X);
float expm1f(float X);
DESCRIPTION
`expm1' and `expm1f' calculate the exponential of X and subtract 1,
that is, e raised to the power X minus 1 (where e is the base of the
natural system of logarithms, approximately 2.71828). The result is
accurate even for small values of X, where using `exp(X)-1' would lose
many significant digits.
RETURNS
e raised to the power X, minus 1.
PORTABILITY
Neither `expm1' nor `expm1f' is required by ANSI C or by the System V
Interface Definition (Issue 2).
SEE ALSO
expm1 is part of the library. The full documentation for is maintained
as a Texinfo manual. If info and are properly installed at your site,
the command
info
will give you access to the complete manual.
NEWLIB April 2010 EXPM1(3)
