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Manual Reference Pages  - erfc (3)

NAME
erfc(3f) - [FORTRAN:INTRINSIC:MATHEMATICS] Complementary error function

SYNTAX
result = erfc(x)

DESCRIPTION
erfc(x) computes the complementary error function of X, defined as $$ 1 - \text{erf}(x) = 1 - \frac{2}{\sqrt{\pi}} \int_0**x e**{-t**2} dt. $$

ARGUMENTS
X The type shall be REAL.

RETURN VALUE
The return value is of type REAL and of the same kind as X. It lies in the range

0 <= ERFC(X) <= 2.

EXAMPLE
Sample program: 

   program demo_erfc
   use, intrinsic :: iso_fortran_env, only : real_kinds, real32, real64, real128
   implicit none
   real(kind=real64) :: x = 0.17_real64
     x = erfc(x)
   end program demo_erfc

STANDARD
[[Fortran 2008]] and later

CLASS
[[Elemental function]]

erfc (3) March 11, 2021
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