characterp (ANSI and GNU Common Lisp Document)

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#### 13.2.7 characterp [Function]

`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)