Well I can see that I haven't done any learning of Haskell for ages. Now that I look back at it, it all looks like gobbledigook to me. Well I probably need to get on with doing some questions:

Exercises

1. Redo the "Haskell greeting" exercise in Simple input and output/Controlling actions, this time using a case statement.

myDoGuessing num = do
        putStrLn "Enter your guess:"
        guess <- getLine
        case compare (read guess) num of
                LT -> do putStrLn "Too low!"
                         myDoGuessing num
                GT -> do putStrLn "Too high!"
                         myDoGuessing num
                EQ -> do putStrLn "You Win!"

1. What does the following program print out? And why?

main =
 do x <- getX
    putStrLn x

getX =
 do return "My Shangri-La"
    return "beneath"
    return "the summer moon"
    return "I will"
    return "return"
    return "again"

I thought it would print out 'again'. The reason is that getX executes a series of actions and the last one is what the function evaluates to.