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ERF(3)			    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	13.2			 July 13, 2014				ERF(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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