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  1. Practice
  2. Functional Programming
  3. Introduction
  4. Hello World
  5. Discussions

Hello World

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  • aindl + 2 comments

    It seems haskell is broken:

    main = print "Hello World"

    Your Output (stdout) "Hello World" Expected Output Hello World

    • abhiranjan + 1 comment

      print -> putStrLn. You should not print ".

      • aindl + 1 comment

        thanks! Than it would make sense to fix https://www.hackerrank.com/challenges/fp-solve-me-first and use putStrLn there as well, because it is confusing.

        • abhiranjan + 1 comment

          Hi @aindl, for string type putStrLn should be preferred. While for non-string types you need to convert it into a string and then use putStrLn on it, and print is doing that for us. Check the difinition of print

          print = putStrLn. show
          • hugo_ratiney + 0 comments

            Thanks, this was confusing to me !

    • mudroljub + 0 comments

      The valid syntax is:

      main = do
  putStrLn "Hello World"

  • sakthipitchaiah + 0 comments

    Scala Code:

    def f() = println("Hello World")

  • xxx666xxx682 + 0 comments

    in haskell

    main = interact $ (\x -> "Hello World")

  • mika3 + 0 comments

    It seems elixir is broken

  • brajrajsingh + 0 comments

    Dear Hackerrank Team Pls enable C/C++ Language in Functional Programming Section

  • robencom + 0 comments

    Lisp solution : (write-line "Hello World")

  • qxzsilver + 0 comments

    beginner OCaml student here, I'm teaching it myself. I don't seem to have problem defining functions for variables (in the classic OO-sense), but I am having problem with stdin/stdout in OCaml. I try to define inputString as read_line, then output the string literal "Hello, world" and then the inputString, but only "Hello, world" is printing. I'm not too sure what is going on.

  • subhashmantha + 0 comments

    object Solution{ def f():Any = {println("Hello World")} def main(args: Array[String]) { f() }

    } does not work an i do not understand why?

  • orubel + 1 comment

    Why isn't Groovy an option? Groovy is a functional programming language. Why isn't it in this category?

    • abhiranjan + 0 comments

      Hi @orubel, referring wiki page, Groovy is primarily a object oriented language, with some support to functional features.

  • avian3 + 1 comment

    Does it support scheme if yes is it lisp that i should choose?

    • abhiranjan + 0 comments

      Hi @avaian3, Racket (formerly known as PLT Scheme) will be another/better option. Though it depends on which course are you pursuing. If you are into SICP, then absolutely go for racket.

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