To bring up the documentation on your machine
$ info elisp
M-x ielm
: interactive shell, feels better than M-x eshell
eq
is it same object?eql
same parameter or same number?equal
equivelant valueslength
get lengthelt
get element in index (elt '(1 2 3) 2)
= 3aset
set index valuemake-string
make string of length N filled with characternot
, and
, or
if
, when
, unless
defun
define function