Hello world
- File hello.hs
main = putStr "Hello world.\n" -- Haskell98 Hello world program
-
NB. - putStr :: String -> IO ()
- putStrLn :: String -> IO ()
- putChar :: Char -> IO ()
- putStrLn :: String -> IO ()
- putStr :: String -> IO ()
- File hello02.hs
main = putStr "Hello " >> putStr "World" >> putStrLn "." -- Another Hello world
- NB. The operator >> combines two (or more) IO actions