! -----------------------------------------------------
!    This program display the cubes of INTEGERs and 
! REALs.  The cubes are computed with two functions:
! intCube() and realCube().
! -----------------------------------------------------

PROGRAM  Cubes
   IMPLICIT   NONE

   INTEGER, PARAMETER :: Iterations = 10
   INTEGER            :: i
   REAL               :: x

   DO i = 1, Iterations
      x = i
      WRITE(*,*)  i, x, intCube(i), realCube(x)
   END DO

CONTAINS

! -----------------------------------------------------
! INTEGER FUNCTION intCube() :
!    This function returns the cube of the argument.
! -----------------------------------------------------

   INTEGER  FUNCTION  intCube(Number)
      IMPLICIT   NONE

      INTEGER, INTENT(IN) :: Number

      intCube = Number*Number*Number
   END FUNCTION  intCube

! -----------------------------------------------------
! REAL FUNCTION realCube() :
!    This function returns the cube of the argument.
! -----------------------------------------------------

   REAL FUNCTION  realCube(Number)
      IMPLICIT  NONE

      REAL, INTENT(IN) :: Number

      realCube = Number*Number*Number
   END FUNCTION  realCube

END PROGRAM  Cubes