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expm1
Langue: en
Version: 2007-07-26 (mandriva - 22/10/07)
Section: 3 (Bibliothèques de fonctions)
NAME
expm1, expm1f, expm1l - exponential minus 1SYNOPSIS
#include <math.h> double expm1(double x);Link with -lm.
float expm1f(float x);
long double expm1l(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
expm1(), expm1f(), expm1l(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _ISOC99_SOURCE; or cc -std=c99
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 numbers that are nearly equal.CONFORMING TO
BSD, C99. The float and long double variants are C99 requirements.SEE ALSO
exp(3), log(3), log1p(3)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre