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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.
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Track mentors

17 Mentors

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

7,033 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 Quan Nguyen

Quan Nguyen https://github.com/quan-nh

Clojurian, [Red]ucer
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 Lucas Barbosa

Lucas Barbosa https://github.com/lvbarbosa

Full-time passionate Clojure developer. Spare time Clojure evangelist. Programming since 2012. Teaching is the best way to learn!
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 Bobby Towers

Bobby Towers These are the Voyages of the Porkostomus

I write software for music and science education, mostly in Clojure but I also enjoy using C, Python and Bash. As a 'professional beginner', my focus is on making small programs that are easy to understand and modify if desired, never considering a topic fully learned until I can confidently explain it to someone else.
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.

Proverb
easy
misc
Leap
easy
misc
Sieve
medium
math
RNA Transcription
easy
misc
Minesweeper
medium
misc
Difference Of Squares
medium
math
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