Hi,
What I needed was actualy something more like
f3 :: Int -> String
f3 x = show x ++ f4 x
f4 :: Int -> IO String
f4 x = do
putStr ("initial value is " ++ show x)
return (show x)
but this gives the error
Type checking
ERROR "teste.hs":11 - Type error in application
*** Expression : show x ++ f4 x
*** Term : f4 x
*** Type : IO String
*** Does not match : [a]
Can you help me?
Thank you
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