[Haskell-cafe] Recursion

[Dave at haskell.org]

Does the following code increase the level of recursion
once for each input line or is the recursive construct
converted to an iteration?

Thanks,
Dave Feustel

main :: IO ()
main = do
  line <- getLine
  processIt line
  main

processIt   :: String -> IO ()
processIt s = do
  print (length s)