U+21FF "⇿" Left Right Open-Headed Arrow Unicode Character
Unicode Version 17.0
⇿
U+21FF "⇿" Left Right Open-Headed Arrow is a typographic symbol that represents bidirectional movement or a two way relationship, distinguished by its open arrowheads on both ends of a horizontal line. This character belongs to the Arrows block in Unicode and is often used in mathematical notation, logic, or technical diagrams to indicate a symmetric or reversible connection where neither direction is prioritized. Its design, with hollow triangular tips, sets it apart from solid headed arrows, subtly suggesting openness or potential lack of tension in the opposing flows.
General Properties
| Code Point | U+21FF |
| Version Added | 3.2 |
| Name | Left Right Open-Headed Arrow |
| Block | Arrows |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⇿ |
| HTML Hex Encoding | ⇿ |
| UTF-8 Encoding | 0xE2 0x87 0xBF |
| UTF-16 Encoding | 0x21FF |
| UTF-32 Encoding | 0x000021FF |
| C/C++/Java Escape | \u21ff |
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 |