Hello World
Hello World

Hello World

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


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.

Common pitfalls that you should avoid

  • Usually there is no need in Scala to use return. For a discussion see here. Or as a quote from that discussion: Don't use return, it makes Scala cry.
Last updated 17 November 2021
Edit via GitHub The link opens in a new window or tab
Scala Exercism

Ready to start Hello World?

Sign up to Exercism to learn and master Scala with 91 exercises, and real human mentoring, all for free.