U+298B "⦋" Left Square Bracket with Underbar Unicode Character
Unicode Version 17.0
⦋
U+298B "⦋" Left Square Bracket with Underbar is a punctuation mark used primarily in mathematical and formal notation, where it denotes a bracketing operation with a distinguishing underscore. It belongs to the Miscellaneous Mathematical Symbols-B block, introduced in Unicode 3.2, and is often employed in contexts such as interval notation or specialized algebraic expressions to indicate a half-open boundary or a variant bracket function. Its design combines a standard opening square bracket with a horizontal line extending from the bottom of the left vertical stroke, giving it a distinct visual cue that separates it from more common bracket forms.
General Properties
| Code Point | U+298B |
| Version Added | 3.2 |
| Name | Left Square Bracket with Underbar |
| Block | Miscellaneous Mathematical Symbols-B |
| General Category | Open Punctuation |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Mirrored Character | "⦌" U+298C Right Square Bracket with Underbar |
| Bidirectional Paired Bracket Type | Open |
| Bidirectional Paired Bracket | "⦌" U+298C Right Square Bracket with Underbar |
Encodings
| HTML Decimal Encoding | ⦋ |
| HTML Hex Encoding | ⦋ |
| UTF-8 Encoding | 0xE2 0xA6 0x8B |
| UTF-16 Encoding | 0x298B |
| UTF-32 Encoding | 0x0000298B |
| C/C++/Java Escape | \u298b |