Simple IO Monad problem

Hello, I'm starting to use Haskell for writing actual programs using monads and I'm already lost. I have the following script: #!/usr/bin/runhugs

module Main where import System(getArgs) main = do putStr "Hello, World\n" strs <- getArgs map putStrLn strs

Which gives the following error: runhugs: Error occurred Reading file "./mailalias.lhs": Reading file "/usr/lib/hugs/lib/System.hs": Reading file "./mailalias.lhs": Type checking ERROR "./mailalias.lhs":5 - Type error in final generator *** Term : map putStrLn strs *** Type : [IO ()] *** Does not match : IO a Can someone please explain what I'm doing wrong? Thanks!