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8.99 EPSILON — Epsilon function ¶

Synopsis:

RESULT = EPSILON(X)

Description:

EPSILON(X) returns the smallest number E of the same kind as X such that 1 + E > 1.

Class:

Inquiry function

Arguments:

X	The type shall be REAL.

Return value:

The return value is of same type as the argument.

Example:

program test_epsilon
    real :: x = 3.143
    real(8) :: y = 2.33
    print *, EPSILON(x)
    print *, EPSILON(y)
end program test_epsilon

Standard:

Fortran 90 and later