Hello, I've been studying more Haskell and I've improved a lot. But I just hit a small problem. I want to print all the elements of a linst (putStr). I'd like to write something like this: print_list [] = do putStr "" print_list (x:xs) = (do putStr x) && print_list xs I know this is wrong, but I hope you can see what I'm trying to do. I know of other ways I could print a list. For example: print_list xs = do putStr(join xs) where join [] = "" join (x:xs) = (show x) ++ "\n" ++ join xs But the thing is, I want to write a lazy version of this function. It's not that I need such a function, I'm just trying to learn Haskell. Any suggestions? Question: What do you call a function that has side-effects? (like putStr) I know that "function" is the wrong term. Cheers, Daniel. -- /\/`) http://oooauthors.org /\/_/ http://opendocumentfellowship.org /\/_/ \/_/ I am not over-weight, I am under-tall. /