cons

cons Function

Syntax:

cons object-1 object-2 → cons

Arguments and Values:

object-1—an object.

object-2—an object.

cons—a cons.

Description:

Creates a fresh cons, the car of which is object-1 and the cdr of which is object-2.

Examples:

(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) 

See Also:

list

Notes:

If object-2 is a list, cons can be thought of as producing a new list which is like it but has object-1 prepended.

Expanded Reference: cons

tip

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