Emacs Lisp

Emacs Lisp is an open source programming language created in 1985 by Richard Stallman.

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Emacs Lisp is a dialect of the Lisp programming language used as a scripting language by Emacs (a text editor family most commonly associated with GNU Emacs and XEmacs). It is used for implementing most of the editing functionality built into Emacs, the remainder being written in C (as is the Lisp interpreter itself). Emacs Lisp is also referred to as Elisp, although there is also an older, unrelated Lisp dialect with that name. Read more on Wikipedia...

Emacs Lisp Wikipedia page
Emacs Lisp docs
There are at least 1,305 Emacs Lisp repos on GitHub
Emacs Lisp first developed in GNU Project
file extensions for Emacs Lisp include el, emacs, emacsdesktop and elc
The Google BigQuery Public Dataset GitHub snapshot shows 13k users using Emacs Lisp in 17k repos on GitHub
Emacs Lisp on HOPL
Emacs Lisp appears in the TIOBE Index
Emacs Lisp Ubuntu package
Pygments supports syntax highlighting for Emacs Lisp
GitHub supports syntax highlighting for Emacs Lisp
Emacs Lisp appears in the Quine Relay project
There is a central package repository for Emacs Lisp
See also: (8 related languages)Lisp, Common Lisp, Emacs, C, Unix, Bourne shell, Perl, Scheme

Example from hello-world:

(message "Hello World")

Example from Linguist:

(print "Dude!")

Example from Wikipedia:

(defun switch-to-next-window-in-split ()
  (set-window-buffer (next-window) (other-buffer)))

(advice-add 'split-window-vertically :before #'switch-to-next-window-in-split)

Feature	Supported	Token	Example
Strings	✓	"	"Hello world"
Print() Debugging	✓	print
Comments	✓		; A comment
Line Comments	✓	;	; A comment
Lispy	✓
Semantic Indentation	X
MultiLine Comments	X

Emacs Lisp - Programming language

Language features