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9.76 DIGITS — Significant binary digits function

Description:
DIGITS(X) returns the number of significant binary digits of the internal model representation of X. For example, on a system using a 32-bit floating point representation, a default real number would likely return 24.
Standard:
Fortran 95 and later
Class:
Inquiry function
Syntax:
RESULT = DIGITS(X)
Arguments:

X The type may be INTEGER or REAL.

Return value:
The return value is of type INTEGER.
Example:
          program test_digits
              integer :: i = 12345
              real :: x = 3.143
              real(8) :: y = 2.33
              print *, digits(i)
              print *, digits(x)
              print *, digits(y)
          end program test_digits