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8.250 SELECTED_UNSIGNED_KIND — Choose unsigned kind ¶

Synopsis:

RESULT = SELECTED_UNSIGNED_KIND(R)

Description:

SELECTED_UNSIGNED_KIND(R) return the kind value of the smallest integer type that can represent all values ranging from 0 to 10^R (exclusive). If there is no unsigned kind that accommodates this range, SELECTED_UNSIGNED_KIND returns -1.

Class:

Transformational function

Arguments:

R	Shall be a scalar and of type INTEGER.

Example:

program large_unsigned
  integer,parameter :: k5 = selected_unsigned_kind(5)
  integer,parameter :: k15 = selected_unsigned_kind(15)
  unsigned(kind=k5) :: i5
  unsigned(kind=k15) :: i15

  print *, huge(i5), huge(i15)
end program large_unsigned

Standard:

Extension for UNSIGNED (see Unsigned integers)