7.63 EPSILON — Epsilon function

Description:

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

Standard:

Fortran 95 and later

Class:

Inquiry function

Syntax:

RESULT = EPSILON(X)

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