• upper-case-p character → generalized-boolean
• lower-case-p character → generalized-boolean
• both-case-p character → generalized-boolean

• character - a character.
• generalized-boolean - a generalized boolean.

These functions test the case of a given character.

upper-case-p returns true if character is an uppercase character; otherwise, returns false.

lower-case-p returns true if character is a lowercase character; otherwise, returns false.

both-case-p returns true if character is a character with case; otherwise, returns false.

(upper-case-p #\A) 

→

true 



(upper-case-p #\a) 

→

false 



(both-case-p #\a) 

→

true 



(both-case-p #\5) 

→

false 



(lower-case-p #\5) 

→

false 



(upper-case-p #\5) 

→

false 



;; This next example presupposes an implementation in which #\Bell is an implementation-defined character.
(lower-case-p #\Bell) 

→

false

None.

None.

Should signal an error of type type-error if character is not a character.

Function CHAR-UPCASE, Function CHAR-DOWNCASE, {\secref\CharactersWithCase}, {\secref\ImplementationDefinedScripts}

None.