Next: alpha-char-p, Previous: character, Up: Characters Dictionary
characterp
object => generalized-boolean
object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is of type character; otherwise, returns false.
(characterp #\a) => true (characterp 'a) => false (characterp "a") => false (characterp 65.) => false (characterp #\Newline) => true ;; This next example presupposes an implementation ;; in which #\Rubout is an implementation-defined character. (characterp #\Rubout) => true
character (type and function), typep
(characterp object) == (typep object 'character)