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Manual Reference Pages  - ERF (3)

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

CONTENTS

Synopsis
Description

#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); 

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).

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

exp(3)

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