Hello World
Hello World

Hello World

Tutorial Exercise


“Hello, World!” will get you writing some Haskell and familiarize yourself with the Exercism workflow. Completing it unlocks the rest of the Haskell Track.

Watch our "Introduction to Hello, World" video to get started 👇


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:

  • Modify the provided code so that it produces 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.

To complete this exercise, you need to define the constant hello.

You will find the type signature for hello already in place, but it is up to you to define its value.

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