ERF(3) BSD Library Functions Manual ERF(3)
NAME
erf, erff, erfl, erfc, erfcf, erfcl -- error function operators
LIBRARY
Math Library (libm, -lm)
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
These functions calculate the error function of x.
The erf(), erff(), and erfl() functions calculate the error function of x; where
erf(x) = 2/sqrt(pi)*integral from 0 to x of exp(-t*t) dt.
The erfc(), erfcf(), and erfcl() functions calculate the complementary error function of x; that is erfc() subtracts the result of the error
function erf(x) from 1.0.
SEE ALSO
math(3)
HISTORY
The erf() and erfc() functions appeared in 4.3BSD.
BSD
July 13, 2014 BSD
