[Haskell-cafe] return?

Hi, I am writing a recursive function which does some IO operation. I encounter situation in which my function has to end recursion by doing "nothing" and otherwise keep calling same function with some different parameters. I did not find anything equivalent to "pass" or "return" statement in Haskell. Presently I have got a workaround. I am doing it by putting a dummy print as described below. can anybody help me in this? e.g f some_params = if some_condition then do putStr "Hacky way to do nothing!" else do perform_some_IO f some_other_params == Vikrant