Variable: emacs-major-version
emacs-major-version is a variable defined in version.el.gz.
Value
31
Documentation
Major version number of this version of Emacs.
Probably introduced at or before Emacs version 19.23.
Source Code
;; Defined in /usr/src/emacs/lisp/version.el.gz
(defconst emacs-major-version
(progn (string-match "^[0-9]+" emacs-version)
(string-to-number (match-string 0 emacs-version)))
"Major version number of this version of Emacs.")