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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.
Fortran 2008 and later
result = erfc(x)x - The type shall be real.The return value is of type real and of the same kind as x. It lies in the range 0 \\leq \\mathop{erfc}(x) \\leq 2.
program test_erfc
real(8) :: x = 0.17_8
x = erfc(x)
end program test_erfc