program exf4 ! exf4.f90   loops, iteration statements

  print *, "exf4.f90 loops, iteration"
  do i = 1,4
     print *, "i=", i
  end do
  do i = 2,10,2  ! even values
     print *, "i=", i
  end do     
  do j = 5,2,-1  ! reverse
     print *, "j=", j
  end do
     
end program exf4