Flashnux

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux

CentOS 4.8

i386

erfc(3)


ERF

ERF

NAME
SYNOPSIS
DESCRIPTION
CONFORMING TO
SEE ALSO

NAME

erf, erff, erfl, erfc, erfcf, erfcl − error function and complementary error function

SYNOPSIS

#include <math.h>

double erf(double x);

float erff(float x);

long double erfl(long double x);

double erfc(double x);

float erfcf(float x);

long double erfcl(long double x);

DESCRIPTION

The erf() function returns the error function of x; defined as
erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt

The erfc() function returns the complementary error function of x, that is 1.0 - erf(x).

CONFORMING TO

SVID 3, BSD 4.3, C99. The float and long double variants are requirements of C99.

SEE ALSO

exp(3)



erfc(3)