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 20.3.5 (i486-pc-linux-gnulibc1, X toolkit)
           of Sat Feb 14 1998 on psilocin.gnu.org"
     

If here is non-nil, it inserts the text in the buffer before point, and returns nil. Called interactively, the function prints the same information in the echo area, but giving a prefix argument makes here non-nil.

The value of this variable indicates the time at which Emacs was built at the local site. It is a list of three integers, like the value of current-time (see Time of Day).

          emacs-build-time
               ⇒ (13623 62065 344633)
     

The value of this variable is the version of Emacs being run. It is a string such as "20.3.1". The last number in this string is not really part of the Emacs release version number; it is incremented each time you build Emacs in any given directory. A value with four numeric components, such as "20.3.9.1", indicates an unreleased test version.

The major version number of Emacs, as an integer. For Emacs version 20.3, the value is 20.

The minor version number of Emacs, as an integer. For Emacs version 20.3, the value is 3.