Mmm, yes I had thought of that. But I wasn't sure how it would work, as you can't have variables in the same sense as imperative languages. So if I create a mainloop sort of function, that passes the old state into itself, then would I have to modify the output within that fucntion to get it to display to the user, correct? Thanks for the response!

Here's an example: let f n = do s <- getLine print n print s f (n+1) let main = f 1 Here the line number is the state. You can have as many state "variables" as you like - just add extra parameters to f. If you have a lot, it's probably worth using a record instead of a whole bunch of separate variables. --KW 8-)