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 |
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Programming Overview of LISP (LISt Processing) Language
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