Arguments and Values

Description

Returns true if object is of type list; otherwise, returns false.

Examples

 (listp nil) ⇒  true
 (listp (cons 1 2)) ⇒  true
 (listp (make-array 6)) ⇒  false
 (listp t) ⇒  false

See Also

consp

Notes

If object is a cons, listp does not check whether object is a proper list; it returns true for any kind of list.

 (listp object) ≡ (typep object 'list) ≡ (typep object '(or cons null))

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