U+21DA "⇚" Leftwards Triple Arrow Unicode Character
Unicode Version 17.0
⇚
U+21DA "⇚" Leftwards Triple Arrow is a typographic symbol used in mathematics, computer science, and formal logic to denote a specific kind of backward or reverse mapping, often representing a leftward tripling or a threefold iteration of a process directed to the left. It stands in contrast to its rightward counterpart, U+21DB "⇛", and is frequently employed to indicate rewinding, reversing a triple step, or a bidirectional relationship involving three parallel arrows in diagrams and technical notation. While less common in everyday text, this arrow adds precision in contexts like chemical equations, state transitions, or abstract rewriting systems.
General Properties
| Code Point | U+21DA |
| Version Added | 1.1 |
| Name | Leftwards Triple Arrow |
| Unicode 1.0 Name | Left Triple Arrow |
| Block | Arrows |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⇚ |
| HTML Hex Encoding | ⇚ |
| UTF-8 Encoding | 0xE2 0x87 0x9A |
| UTF-16 Encoding | 0x21DA |
| UTF-32 Encoding | 0x000021DA |
| C/C++/Java Escape | \u21da |
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 |
| Other Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |