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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

7,502 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 Matthias Wimmer

Matthias Wimmer Matthias' Blog

After being a professional Java developer for around 10 years, I started to introduce Clojure at work to improve development speed. I believe in functional programming and immutability for software quality and better code.
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 Practicalli Stevenson

John Practicalli Stevenson Practicalli

Software engineer for 22+ years, last 3 years with Clojure. Learning Clojure since 2012 and now broadcast and write books.
Avatar of Lucas Polymeris

Lucas Polymeris https://github.com/Average-user

Functional programming and Lisp enthusiast.
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.
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.

Hexadecimal
easy
math
Secret Handshake
easy
misc
Say
easy
misc
Binary Search Tree
easy
misc
Beer Song
easy
misc
Gigasecond
easy
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