cons
(cons first_element list)
The cons function constructs a list by combining first_element and list.
If the second argument is an atom, the function constructs a dotted pair list. Functions like entmake or entmod require this kind of list.
: (cons 8 "0")
(8 . "0")
: (cons '1 '(2 3 4))
(1 2 3 4)
: (cons '(1) '(2 3 4))
((1) 2 3 4)