U+29EF "⧯" Error-Barred Black Square Unicode Character
Unicode Version 17.0
⧯
U+29EF "⧯" Error-Barred Black Square is a mathematical symbol that appears as a solid black square with a vertical line or "error bar" extending from its top and bottom edges, used primarily in statistical and scientific notation to represent a data point with an associated margin of error, uncertainty, or tolerance. It belongs to the Miscellaneous Mathematical Symbols-B block, encoded for use in technical and academic documents where such visual shorthand is required to convey measurement precision or variability.
General Properties
| Code Point | U+29EF |
| Version Added | 3.2 |
| Name | Error-Barred Black Square |
| Block | Miscellaneous Mathematical Symbols-B |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⧯ |
| HTML Hex Encoding | ⧯ |
| UTF-8 Encoding | 0xE2 0xA7 0xAF |
| UTF-16 Encoding | 0x29EF |
| UTF-32 Encoding | 0x000029EF |
| C/C++/Java Escape | \u29ef |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |