LISP Functions ⤴
← (list)

(listp)

(load) →

(listp item)

Determine whether an item is a list.

This function tests if item is a list. If the item following listp is a list, the function returns T. If not, nil is returned.

Examples

Code Returns
(listp '("one" "two" "three")) T
(listp "one") nil
(listp 1.00) nil

Tell me about...

(list expression )

(numberp item)

(reverse list)

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language