Clojure

Join the Clojure Track
Clojure is a dynamic, general-purpose programming language. It combines the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming and the performance gains of compiling and running on the JVM. It is a lisp dialect that runs on the JVM, enabling the use of Java code side by side with Clojure.
Join the Clojure Track
Track mentors

17 Mentors

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

6,762 Students

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

76 Exercises

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

About Clojure

(ns hello-world)

(defn hello
  ([] (hello "World"))
  ([name] (str "Hello, " name "!")))

Clojure is a dynamic programming language that targets the Java Virtual Machine (JVM). Designed as a general purpose language, Clojure combines the approachability of a scripting language with a robust infrastructure for multithreaded programming.

Clojure is predominantly a functional programming language, and features a rich set of immutable, persistent data structures.

Clojure is open source, and information about contributing to the language can be found here.

Rich Hickey, the creator of Clojure, wanted a modern Lisp for functional programming, symbiotic with the established Java platform, and designed for concurrency; thus, Clojure was born.

Here are a couple quotes that exemplify the goals of Clojure:

  • Good design is not about making grand plans, but about taking things apart.
  • Programming is not about typing...it's about thinking.
Join the Clojure track

Self-contained finite problems with which to learn the language

I have spent time with the Clojure, Elixir & Go tracks and all have been incredibly beneficial, providing self-contained finite problems with which to learn the language. The Go language track has been wonderful in introducing me to the language, what idiomatic code is, and the many different ways in which one can solve a problem.

Relaxed. Encouraging. Supportive.

Meet the Clojure Track mentors

Once you join the Clojure 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 Darrell Pittman

Darrell Pittman https://github.com/darrell-pittman

20 years experience, mostly java, javascript and ruby. I love functional programming and have been studying clojure for ~6 months. I have done one small clojure project professionally.
Avatar of Tuomo Virolainen

Tuomo Virolainen https://github.com/tvirolai

Functional programmer and lisper. I got interested in Clojure in about 2015 and it quickly became my tool of choice for most tasks.
Avatar of John Carnell

John Carnell https://github.com/carnellj

I am a prolific speaker and writer and regularly speak at local user groups and industry conferences. I program mainly in Clojure and Java (my last book was Spring Microservices in Action). I have spent the last 3.5 years writing Clojure code for a cloud-based telephony company.
Avatar of Daniel Brook-Roberge

Daniel Brook-Roberge

Longtime developer, recent Clojurian. Ex-academic web developer who loves code review so much I'm volunteering to do more here!
Avatar of Jesús Gómez

Jesús Gómez https://github.com/jgomo3

Considered for a new version of the legacy System I'm working with, a coworker presented Clojure to me and we found early it helps a lot on keeping complexity low with a systemic aproach to software projects. We have used in some prototypes. Still learning all I can of it, I hope I could share some knowledege of it by mentoring and learn at the same time.
Avatar of Andrea Crotti

Andrea Crotti https://github.com/AndreaCrotti

Around 3 year of Clojure/Clojurescript experience and working full stack with Clojure since 2017. Member of the Church of Emacs.
Fun. Challenging. Interesting

Community-sourced Clojure exercises

These are a few of the 76 exercises on the Clojure track. You can see all the exercises here.

Difference Of Squares
medium
math
Pascal's Triangle
easy
math
Complex Numbers
easy
math
Sum Of Multiples
easy
math
Flatten Array
easy
misc
Minesweeper
medium
misc
Passionate. Knowledgeable. Creative.

Meet the Clojure Track maintainers

The Clojure Maintainers are the brains behind the Clojure Track. They spend their spare time creating interesting and challenging exercises that we can all learn from. We are incredibly grateful for their hard work. Here are the bios of a few of the maintainers of this track.

Avatar of Matthaus Owens

Matthaus Owens

This maintainer has not added their bio yet.

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

Join the Clojure Track