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  1. Practice
  2. Functional Programming
  3. Recursion
  4. Pascal's Triangle
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Pascal's Triangle

  • strawstack
     + 2 comments

    UPDATE: Finally, figured out how to print a [[Char]] in the correct format with Haskell...

    -- PRINT with FORMAT    
two :: [Int] -> [String]
two m = map (show) m

three :: [[Int]] -> [[String]]
three m = map (two) m

main = do   
   m <- readLn :: IO Int
   --send (tri m) -- print tri to row m
   mapM_ (putStrLn . intercalate " " $) (three (tri m))

    Where (tri m) produces [["1"], ["1", "1"], ["1", "2", "1"], ["1", "3", "3", "1"]]