What's difference between Integer and Int?

Hello glasgow-haskell-users, The following program ----------------------------------------------- --main = print (show (fibs!!200000)) main = print (show (nth 200000 fibs)) nth 0 (h:_) = h nth n (h:t) = nth (n-1) t fibs :: [Integer] -- fibs = 1 : (map snd $ iterate (\(x,y) -> (y, x+y)) (1,1)) fibs = [1..] ----------------------------------------------- compiled with ghc 6.0: ghc -O -o a.exe a.hs does not execute correctly. It causes stack overflow in 1M stack. If we change "fibs :: [Integer]" to "fibs :: [Int]" the new program runs Ok. -- Best regards, Serguey mailto:sz@uc.ru