Exercism v3 launches on Sept 1st 2021. Learn more! 🚀🚀🚀


Join the Crystal Track
TODO: The maintainers have not provided an introduction for this track.
Join the Crystal Track
Track mentors

3 Mentors

Our mentors are friendly, experienced Crystal developers who will help teach you new techniques and tricks.
Track students

1,183 Students

Join hundreds of students who have enjoyed learning and improving their skills by taking this track.
Track exercises

50 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About Crystal

class HelloWorld
  def self.hello(name = "World")
    "Hello, #{name}!"

Crystal is a compiled language that is currently in the alpha stages of development. These are some of the language's goals:

  • Ruby-inspired syntax.

  • Statically type-checked but without having to specify the type of variables or method arguments.

  • Be able to call C code by writing bindings to it in Crystal.

  • Have compile-time evaluation and generation of code, to avoid boilerplate code.

  • Compile to efficient native code.

Join the Crystal track

A tremendous learning opportunity to explore the depth of your own knowledge

Exercism is fantastic in learning new languages but that is not the extent of it. If you are a "more experienced" programmer you may have encountered impostor syndrome: the idea you don't really know what you think you know. Exercism lets you solve problems and put them in the space of open feedback which is a tremendous learning opportunity to explore the depth of your own knowledge. Even if you have been programming in a language for awhile it is worth checking into Exercism to see where you stand with current implementation practices.

Relaxed. Encouraging. Supportive.

Meet the Crystal Track mentors

Once you join the Crystal language track, you will receive support and feedback from our team of mentors. Here are the bios of a few of the mentors of this track.

Avatar of Lukas Gerlach

Lukas Gerlach https://github.com/monsterkrampe

I'm studying CS and work as a FE Dev. I currently enjoy crystal very much, so I'm happy to help you learning it.
Avatar of DT

DT https://github.com/epoch

I'm here to beat the devil out of your code
Avatar of Todd Resudek

Todd Resudek https://github.com/supersimple

I am happy to help. Crystal is a beautiful language that is also very fast.
Fun. Challenging. Interesting

Community-sourced Crystal exercises

These are a few of the 50 exercises on the Crystal track. You can see all the exercises here.

Matching Brackets
Collatz Conjecture
Protein Translation
Resistor Color

Get started with the Crystal track. As with everything on Exercism, it's 100% free!

Join the Crystal Track