8.74 ERF — Error function

Description:

ERF(X) computes the error function of X.

Standard:

Fortran 2008 and later

Class:

Elemental function

Syntax:

RESULT = ERF(X)

Arguments:

X	The type shall be REAL.

Return value:

The return value is of type REAL, of the same kind as X and lies in the range -1 \leq erf (x) \leq 1 .

Example:

          program test_erf
            real(8) :: x = 0.17_8
            x = erf(x)
          end program test_erf

Specific names:

Name	Argument	Return type	Standard
DERF(X)	REAL(8) X	REAL(8)	GNU extension