The main problem of learning Haskell is the very beginning, the first step: to write a working program, which
* as small as possible, and
* more than just print "Hello, World!"
Finally, I found it in the tutorial: "How to write a Haskell program".
-- -- Copyright (c) 2006 Don Stewart - http://www.cse.unsw.edu.au/~dons -- GPL version 2 or later (see http://www.gnu.org/copyleft/gpl.html) -- import System.Environment -- | 'main' runs the main program main :: IO () main = getArgs >>= print . haqify . head haqify s = "Haq! " ++ s