Hello world

File hello.hs

main = putStr "Hello world.\n" -- Haskell98 Hello world program

NB.	putStr :: String -> IO () putStrLn :: String -> IO () putChar :: Char -> IO ()

File hello02.hs

main = putStr "Hello " >> putStr "World" >> putStrLn "." -- Another Hello world

NB. The operator >> combines two (or more) IO actions