cons
cons object-1 object-2 → cons
object-1—an object.
object-2—an object.
cons—a cons.
15.1.0 8Creates a fresh cons, the car of which is object-1 and the cdr of which is object-2.
(cons 1 2) → (1 . 2)
(cons 1 nil) → (1)
(cons nil 2) → (NIL . 2)
(cons nil nil) → (NIL)
(cons 1 (cons 2 (cons 3 (cons 4 nil)))) → (1 2 3 4)
(cons 'a 'b) → (A . B)
(cons 'a (cons 'b (cons 'c ' ()))) → (A B C)
(cons 'a '(b c d)) → (A B C D)
None.
None.
None.
cons can be thought of as producing a new list which is like it but has object-1 prepended.