ERF

Section: Linux Programmer's Manual (3)
Updated: 2002-07-27
Index Return to Main Contents
 

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);
Link with -lm.  

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

SVr4, 4.3BSD, C99. The float and long double variants are requirements of C99.  

SEE ALSO

cerf(3), exp(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
CONFORMING TO
SEE ALSO

linux.jgfs.net manual pages