U+298C "⦌" Right Square Bracket with Underbar Unicode Character

U+298C "⦌" Right Square Bracket with Underbar is a typographic symbol classified under the Miscellaneous Mathematical Symbols-B block, designed primarily for use in mathematical notation and specialized formatting contexts. It visually resembles a standard right square bracket, but with a distinctive horizontal line, or underbar, drawn beneath it, which can serve to indicate a specific boundary, grouping, or semantic nuance in formal expressions. This character is not commonly found in everyday text, but it may appear in technical documents, logic, or computer science discussions where precise bracket variants are needed to denote subsets, intervals, or syntactic levels distinct from ordinary brackets.