-- exhl1.hs  example  print string, integer, float
main :: IO ()
main =  do

  print "haskell  exhl1.hs  running";
  print "next line"
  print 7
  print 'A'
  print 37.235E-7
  print [[1,2], [3,4,5]]
  print (('a',1), ('c', 2, 123.456))
  putStr "Hello "
  putStr "again"
  putStr " and again\n" -- new line works
  putStrLn "more lines"
  putStrLn ("option "++show(7)++" of show")


  print "exhl1.hs finished";