These facilities provide information about which version of Emacs is in use.
This function returns a string describing the version of Emacs that is running. It is useful to include this string in bug reports.
(emacs-version) ⇒ "GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.16) of 2015-06-01"
If here is non-
nil, it inserts the text in the buffer
before point, and returns
nil. When this function is called
interactively, it prints the same information in the echo area, but
giving a prefix argument makes here non-
The value of this variable indicates the time at which Emacs was
built. It is a list of four integers, like the value of
current-time (see Time of Day).
emacs-build-time ⇒ (20614 63694 515336 438000)
The value of this variable is the version of Emacs being run. It is a
string such as
"23.1.1". The last number in this string is not
really part of the Emacs release version number; it is incremented
each time Emacs is built in any given directory. A value with four
numeric components, such as
"188.8.131.52", indicates an
unreleased test version.
The major version number of Emacs, as an integer. For Emacs version 23.1, the value is 23.
The minor version number of Emacs, as an integer. For Emacs version 23.1, the value is 1.