Hello World
Hello World

Hello World

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

Project Structure

Clojure exercises in exercism use leiningen to configure and run your code and use leiningen standard directory structure.

You will find a test file named hello_world_test.clj inside test directory. Write your code in src/hello_world.clj. It should use the namespace hello-world so that tests can pick it up.

Running tests

Run the tests using lein test command and make them pass:

$ lein test

lein test hello-world-test

Ran 3 tests containing 3 assertions.
0 failures, 0 errors.

Then submit the exercise using:

$ exercism submit src/hello_world.clj

For more detailed instructions and learning resources refer exercism's clojure language page.

Last updated 17 May 2023
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