Lahey/GNU Fortran

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8.34 BIT_SIZE — Bit size inquiry function

Description:
BIT_SIZE(I) returns the number of bits (integer precision plus sign bit) represented by the type of I. The result of BIT_SIZE(I) is independent of the actual value of I.
Standard:
Fortran 95 and later
Class:
Inquiry function
Syntax:
RESULT = BIT_SIZE(I)
Arguments:

I The type shall be INTEGER.

Return value:
The return value is of type INTEGER
Example:
          program test_bit_size
              integer :: i = 123
              integer :: size
              size = bit_size(i)
              print *, size
          end program test_bit_size