U+29FA "⧺" Double Plus Unicode Character
Unicode Version 17.0
⧺
U+29FA "⧺" Double Plus is a mathematical symbol that represents a double addition or a special binary operator, often used in contexts like formal logic, algebraic topology, or higher-dimensional mathematics to indicate a repeated or enhanced summing operation distinct from a standard plus sign. It is formally encoded in the Unicode Standard under the "Supplemental Mathematical Operators" block, where it serves as a stylistic variant or specialized glyph for denoting a sum over two indices or a concatenation-like operation. Its visual appearance, featuring two stacked plus signs, distinguishes it from the ordinary plus sign and prevents ambiguity in technical notations where multiple sums or custom operations are required.
General Properties
| Code Point | U+29FA |
| Version Added | 3.2 |
| Name | Double Plus |
| 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 0xBA |
| UTF-16 Encoding | 0x29FA |
| UTF-32 Encoding | 0x000029FA |
| C/C++/Java Escape | \u29fa |
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 |