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Triangular number calculator

By Mushy-pea on Feb 15th, 2007 10:04 pm

Well, I asked Dani and she said I could create a Haskell catagory in code snippits just by submitting a Haskell program :p . What self respecting code repository would be without one? So here goes, this program calculates the nth triangular number, given n by the user.

Steven.

module Main
      where

result x = foldr (+) 0 [1..read x]

main = do
putStrLn("Your input: ")
user_data <- getLine
putStrLn("My output: ")
print(result user_data)

5 Years Ago

Interesting, how do you run this program?

Lardmeister

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5 Years Ago

It's not good form to put the body of a 'do' block (or any other artifact) on the first row. It's probably illegal, and although GHC accepts the syntax, it won't let you put any more top-level definitions in the file.

Rashakil Fol

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5 Years Ago

Oh, and to run this program, type 'ghc --make foo.hs' (where foo.hs is your actual filename) to compile and then run the program foo. You'll need to get GHC though.

Rashakil Fol

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This article has been dead for over three months

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