Manpage of EXPM1
EXPM1
Section: NEWLIB (3)
Updated: 2005 Feb 23
Index
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NAME
1.32 `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
libm
library.
The full documentation for
libm
is maintained as a Texinfo manual. If
info
and
libm
are properly installed at your site, the command
-
info libm
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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