SketchyLISP Reference |
Copyright (C) 2007 Nils M Holm |
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Conformance: R5RS Scheme
Purpose: Test whether a char is an upper case letter.
Arguments:
X - char
Implementation:
(define (char-upper-case? x) (and (char<=? #\A x) (char<=? x #\Z)))
Example:
(char-upper-case? #\X) => #t
See also:
char-lower-case?,
char-alphabetic?.
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