epsilon(x): Epsilon

Epsilon function.

Declaration

Syntax

retval = epsilon(x)
elemental real function epsilon(x)

Arguments

x the input value must be of type real.

Return values

The return value is of same type as of the input argument.

Description

epsilon(x) computes the smallest number \(\epsilon\) of the same kind as x following:

\(1 + \epsilon > 1\)

Types

Supported argument types is real.

interface epsilon
    module procedure sepsilon, depsilon
end interface

contains

elemental real(sp) function sepsilon(x)
real(sp), intent(in) :: x
end function

elemental real(dp) function depsilon(x)
real(dp), intent(in) :: x
end function

Examples

program intrinsics_epsilon
	print *, epsilon(3.143)
end program

Result:

1.19209290E-07

See Also