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erf (changes)
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Description
erf(x) computes the error function of x, defined as
\\text{erf}(x) = \\frac{2}{\\sqrt{\\pi}} \\int_0^x e^{-t^2} dt.
Standard
Fortran 2008 and later
Class
Syntax
result = erf(x)
Arguments
x- The type shall bereal.
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 category: intrinsics