(char->integer char)
(integer->char n)
See R^4RS.
(char-upper-case? char)
(char-lower-case? char)
See R^4RS.
(char-alphabetic? char)
(char-numeric? char)
(char-whitespace? char)
See R^4RS.
(char-upcase char)
(char-downcase char)
See R^4RS.
(char=? char1 char2)
(char<? char1 char2)
(char>? char1 char2)
(char<=? char1 char2)
(char>=? char1 char2)
See R^4RS.
(char-ci=? char1 char2)
(char-ci<? char1 char2)
(char-ci>? char1 char2)
(char-ci<=? char1 char2)
(char-ci>=? char1 char2)
See R^4RS.
(char? obj)
See R^4RS.