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About Racket

#lang racket

(provide hello)

(define (hello [name "World"])
  (string-append "Hello, " name "!"))

77 coding exercises for Racket on Exercism. From Square Root to List Ops.

Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.

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Key Features of Racket



Racket comes with the tools to write your own programming language.

A modern Lisp

Racket is a modern dialect of Lisp, an influential language with a rich history.


Racket is primarily functional, but it supports imperative and object-oriented programming too.

Simple syntax

Racket's syntax is simple, expressive and easy to learn.


Racket is an actively-developed research testbed for intriguing new language features.


It's easy to customize the language to your liking with Racket's macro system.

Get mentored the Racket way

Every language has its own way of doing things. Racket is no different. Our mentors will help you learn to think like a Racket developer and how to write idiomatic code in Racket. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in Racket - they'll help you discover the things you don't know that you don't know.

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Community-sourced Racket exercises

The Racket track on Exercism has 77 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

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