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FilledSmallSquareUpperCaseQ[string] yields True if all the characters in the string are upper-case letters, and yields False otherwise.

FilledSmallSquareUpperCaseQ treats both ordinary and special characters.

FilledSmallSquare See The Mathematica Book: Section 2.7.4.

FilledSmallSquare See also: LowerCaseQ, LetterQ, ToUpperCase, ToCharacterCode.

Further Examples