Emacs Lisp
Emacs Lisp
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About Emacs Lisp

(defun hello (&optional name)
  "Say hello, optionally to NAME."
  (let ((greetee (or name "World")))
    (concat "Hello, " greetee "!")))

40 coding exercises for Emacs Lisp on Exercism. From Atbash Cipher to Hamming.

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

Atbash Cipher

Atbash Cipher

Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.

Run-Length Encoding

Run-Length Encoding

Implement run-length encoding and decoding.

Hamming

Hamming

Calculate the Hamming difference between two DNA strands.

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Every language has its own way of doing things. Emacs Lisp is no different. Our mentors will help you learn to think like a Emacs Lisp developer and how to write idiomatic code in Emacs Lisp. 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 Emacs Lisp - they'll help you discover the things you don't know that you don't know.

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Community-sourced Emacs Lisp exercises

The Emacs Lisp track on Exercism has 40 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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Emacs Lisp

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