keywordp
object => generalized-boolean
object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is a keyword_1; otherwise, returns false.
(keywordp 'elephant) => false (keywordp 12) => false (keywordp :test) => true (keywordp ':test) => true (keywordp nil) => false (keywordp :nil) => true (keywordp '(:test)) => false (keywordp "hello") => false (keywordp ":hello") => false (keywordp '&optional) => false