characterp

characterp Function

Syntax:

characterp object → generalized-boolean

Arguments and Values:

object—an object.

generalized-boolean—a generalized boolean.

Description:

Returns true if object is of type character; otherwise, returns false.

Examples:

(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 

See Also:

character (type and function), typep

Notes:

(characterp object) ≡ (typep object ’character)

Expanded Reference: characterp

tip

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(characterp )