C this program demonstrate several features of fortran77
C notice how columns are aligned
C23456789012345678901234567890
      program program2


      print*,' hello '  ! write to terminal
      write(6,*)' hello again '  ! this does the same
C comment: now ask for some numbers
      print*,' give me a number '
      read*,x
      write(6,*)' give me another number '
      read(5,*)y   ! another read to read from terminal
      z = x+y
     & - 1.0
      print*,' z =', z
      end