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Index
character Characters Dictionary alpha-char-p
Function

characterp

characterp object ⇒ generalized-boolean

Arguments and Values

objectan object.
generalized-booleana 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)

Backlinks

Characters Dictionary, Symbols in the COMMON-LISP Package