Crystal

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

509 Students

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

32 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}!"
  end
end

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

Exercism is a great website

What I like about it is that I am able to solve the challenges in a TDD way working in a environment that I am familiar (my own PC not a browser IDE) and the cherry on the top of the cake is that I have access to code reviews.

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 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.
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.
Fun. Challenging. Interesting

Community-sourced Crystal exercises

These are a few of the 32 exercises on the Crystal track. You can see all the exercises here.

ISBN Verifier

easy
arrays
strings

Difference Of Squares

easy
math

Space Age

easy
conditionals
floating point numbers
integers

Hello World

easy
misc

Pangram

easy
misc

Raindrops

easy
misc

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

Join the Crystal Track