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ERF(3) FreeBSD 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.
FreeBSD 14.0-RELEASE-p6 July 13, 2014 FreeBSD 14.0-RELEASE-p6