symbolp object => generalized-boolean
object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is of type symbol; otherwise, returns false.
(symbolp 'elephant) => true
(symbolp 12) => false
(symbolp nil) => true
(symbolp '()) => true
(symbolp :test) => true
(symbolp "hello") => false
(symbolp object) == (typep object 'symbol)