GNU/Linux |
CentOS 4.8 |
i386 |
erfc(3) |
erf, erff, erfl, erfc, erfcf, erfcl − error function and complementary error function
#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)
erfc(3) |