recognizer for upper case characters
Major Section:  ACL2-BUILT-INS

(Upper-case-p x) is true if and only if x is an upper case character, i.e., a member of the list #\A, #\B, ..., #\Z.

The guard for upper-case-p requires its argument to be a standard character (see standard-char-p).

Upper-case-p is a Common Lisp function. See any Common Lisp documentation for more information.

To see the ACL2 definition of this function, see pf.