The 'upper-case-p' predicate function checks if the 'char' expression is
an upper case character. If 'char' is upper case a
T is returned, otherwise a
NIL is returned. Upper case characters are
'A' [ASCII decimal
(upper-case-p #\A) ; returns T (upper-case-p #\a) ; returns NIL (upper-case-p #\1) ; returns NIL (upper-case-p #\[) ; returns NIL
See the
upper-case-p
predicate function in the