U+21D1 "⇑" Upwards Double Arrow Unicode Character
Unicode Version 17.0
⇑
U+21D1 "⇑" Upwards Double Arrow is a typographic symbol representing a vertical arrow with two parallel shafts pointing upward, typically indicating a strong or emphatic upward movement, direction, or increase. In digital contexts, it is often used in mathematical notation, user interface elements, or diagrams to denote a significant rise, such as in voltage levels or growth metrics, and it can also convey reinforced ascent or progress in textual discussions or symbolic logic. Its design distinguishes it from the single upward arrow by suggesting a doubled or heightened directional intent, making it useful for commands or labels that require explicit upward navigation or emphasis.
General Properties
| Code Point | U+21D1 |
| Version Added | 1.1 |
| Name | Upwards Double Arrow |
| Unicode 1.0 Name | Up Double 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 0x91 |
| UTF-16 Encoding | 0x21D1 |
| UTF-32 Encoding | 0x000021D1 |
| C/C++/Java Escape | \u21d1 |
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 |