How do you find out which emacs version is running in elisp?

I want to do:

if version is emacs-21
some code
else
some other code

How do you find out which emacs version is running in elisp?I want to do:if version is emacs-21    some codeelse    some other code 

+ "Rustom Mody" gmail.com>:

| How do you find out which emacs version is running in elisp?I want
| to do:if version is emacs-21 some codeelse some other code

(cond ((string= (substring emacs-version 0 2) "21")
code for version 21)
((string= (substring emacs-version 0 2) "22")
code for version 22)
(t code for other versions))

"Rustom Mody" gmail.com> writes:

Hi,

,----[ C-h v emacs-major-version RET ]
| emacs-major-version is a variable defined in `version.el'.
| Its value is 22
|
| Documentation:
| Major version number of this version of Emacs.
| This variable first existed in version 19.23.
`----

HTH,
Tassilo

Please check the archive for this mailing list. It's been asked many times
in the past. And part of the answer is that you probably want to check
something more specific than the version number.

Stefan