NAME    [Toc]    [Back]

       erf, erfc - error function and complementary error function

SYNOPSIS    [Toc]    [Back]

       #include <math.h>

       double erf(double x);

       double erfc (double x);

DESCRIPTION    [Toc]    [Back]

       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).

CONFORMING TO    [Toc]    [Back]

       SVID 3, BSD 4.3

SEE ALSO    [Toc]    [Back]

       exp(3)



BSD				  1993-06-25				ERF(3)