U+21DE "⇞" Upwards Arrow with Double Stroke Unicode Character
Unicode Version 17.0
⇞
U+21DE "⇞" Upwards Arrow with Double Stroke is a typographic symbol from the Arrows block, characterized by an upward pointing arrow that features two parallel vertical strokes instead of a single shaft, giving it a bold or emphasized appearance. It is often used in mathematical notation, computing, or diagrammatic contexts to represent concepts such as strict increase, logical implication, or a directional shift with added significance. While not as common as standard single stroke arrows, its double line design visually distinguishes it for applications requiring a stronger or more formal indication of upward movement or progression.
General Properties
| Code Point | U+21DE |
| Version Added | 1.1 |
| Name | Upwards Arrow with Double Stroke |
| Unicode 1.0 Name | Up Arrow with Double Stroke |
| 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 0x9E |
| UTF-16 Encoding | 0x21DE |
| UTF-32 Encoding | 0x000021DE |
| C/C++/Java Escape | \u21de |
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 |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |