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

Pascal's Triangle

  • strawstack + 0 comments

    UPDATE: The program now prints a nested array. Still trying to get Haskell to format basic output? (Output of below is [[1],[1,1],[1,2,1],[1,3,3,1]])

    -- print tri value at coords
pas m n
    | n == 0 = 1 
    | m == n = 1
    | otherwise = pas (m-1) (n-1) + pas (m-1) n
      
-- print row of triangle 
row m = map (pas m) [0..m]   
    
-- print triangle until row
tri m = map (row) [0..(m-1)] 
    
main = do   
   m <- readLn :: IO Int
   print (tri m) -- print tri to row m