erf(3) Library Functions Manual erf(3)
NAME
erf, erfc - Error functions
LIBRARY
Math Library (libm.a)
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);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
erf(): XPG4
erfc(): XPG4
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The erf(), erff(), and erfl() functions return the error function of x, where erf(x), erff(x), and erfl(x) equal (2/sqrt(pi)) times the
area under the curve e**(-t**2) between 0 and x.
The erfc(), erfcf(), and erfcl() functions return (1.0 - erf(x)). The erfc() function can result in an underflow as x gets large. delim
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erf(3)
