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UpperCaseQToUpperCase

LowerCaseQ

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

FilledSmallSquareLowerCaseQ treats both ordinary and special characters.

FilledSmallSquare See The Mathematica Book: Section 2.7.4.

FilledSmallSquare See also: UpperCaseQ, LetterQ, ToLowerCase, ToCharacterCode.

Further Examples

UpperCaseQToUpperCase