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epequeno's solution

to Hello World in the Elm Track

Published at Apr 17 2021 · 0 comments
Test suite

The classical introductory exercise. Just say "Hello, World!".

"Hello, World!" is the traditional first program for beginning programming in a new language or environment.

The objectives are simple:

  • Write a function that returns the string "Hello, World!".
  • Run the test suite and make sure that it succeeds.
  • Submit your solution and check it at the website.

If everything goes well, you will be ready to fetch your first real exercise.

Elm Installation

Refer to the Exercism help page for Elm installation and learning resources.

Writing the Code

The first time you start an exercise, you'll need to ensure you have the appropriate dependencies installed. Thankfully, Elm makes that easy for you and will install dependencies when you try to run tests or build the code.

Execute the tests with:

$ elm-test

Automatically run tests again when you save changes:

$ elm-test --watch

As you work your way through the test suite, be sure to remove the skip <| calls from each test until you get them all passing!


This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program

Submitting Incomplete Solutions

It is possible to submit an incomplete solution so you can see how others have completed the exercise.


module Tests exposing (tests)

import Expect
import HelloWorld exposing (helloWorld)
import Test exposing (..)

tests : Test
tests =
    test "Hello, World!" <|
        \() ->
            Expect.equal "Hello, World!" helloWorld
   This is a "stub" file.  It's a little start on your solution. It's not a
   complete solution though; you have to write some code.

   The module name is expected by the test program and must match the name of this
   file. It has to stay just the way it is.

module HelloWorld exposing (helloWorld)

-- It's good style to include any types at the top level of your modules.

helloWorld : String
helloWorld =
    "Hello, World!"

   When you have a working solution, REMOVE ALL THE STOCK COMMENTS.
   They're here to help you get started but they only clutter a finished solution.
   If you leave them in, nitpickers will protest!

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