NAME

erf, erfc − Error functions

LIBRARY

Math Library (libm.a)

SYNOPSIS

#include <math.h>

double erf   (double x);
float  erff  (float  x);
double erfc  (double x);
float  erfcf (float  x);

DESCRIPTION

erf() and erff() return the error function of x; where erf(x) and erff(x) equal (2 ∗ sqrt(pi)) times the area under the curve e∗∗(-t∗∗2) between 0 and x. 

erfc() and erfcf() return (1.0 - erf (x)). 

EXCEPTIONAL CASES

None