π is the Unicode emoji BACK WITH LEFTWARDS ARROW ABOVE (βBACK arrowβ), code point U+1F519 (decimal 128281) in the Miscellaneous Symbols and Pictographs block, added in Unicode 6.0. In HTML write 🔙, and in UTF-8 it is the 4 bytes F0 9F 94 99.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1F519 |
| Decimal | 128281 |
| UTF-8 bytes | F0 9F 94 99 |
| UTF-16 (big-endian) | D83D DD19 |
| UTF-32 | 0001F519 |
| HTML decimal | 🔙 |
| HTML hex | 🔙 |
| CSS | \1F519 |
| JavaScript | \u{1F519} or \uD83D\uDD19 |
| JSON | \uD83D\uDD19 |
| Python | \U0001F519 |
| Python by name | \N{BACK WITH LEFTWARDS ARROW ABOVE} |
| Java, C# | \uD83D\uDD19 |
| Rust, Swift | \u{1F519} |
| Go, C, C++ | \U0001F519 |
| URL (percent-encoded) | %F0%9F%94%99 |
JavaScript and JSON strings store text as UTF-16, so this character takes two code units (a surrogate pair) and "π".length is 2. Python 3 strings count code points, so its length there is 1.
Properties
| Property | Value |
|---|---|
| Name | BACK WITH LEFTWARDS ARROW ABOVE |
| Emoji name | BACK arrow |
| Code point | U+1F519 (decimal 128281) |
| Block | Miscellaneous Symbols and Pictographs (U+1F300βU+1F5FF) |
| General category | So: Other symbol |
| Script | Common |
| Bidirectional class | ON: Other neutral |
| Mirrored in right-to-left text | No |
| First in Unicode version | 6.0 |
Nearby in Miscellaneous Symbols and Pictographs
- π U+1F511 Key
- π U+1F512 Locked
- π U+1F513 Unlocked
- π U+1F514 Bell
- π U+1F515 Bell with slash
- π U+1F516 Bookmark
- π U+1F517 Link
- π U+1F518 Radio button
- π U+1F51A END arrow
- π U+1F51B ON! arrow
- π U+1F51C SOON arrow
- π U+1F51D TOP arrow
- π U+1F51E No one under eighteen
- π U+1F51F Keycap: 10
- π U+1F520 Input latin uppercase
- π‘ U+1F521 Input latin lowercase
All 768 characters: Miscellaneous Symbols and Pictographs.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 🔙 (decimal) or 🔙 (hex).
- What is the UTF-8 encoding of U+1F519?
- F0 9F 94 99 (hex), 4 bytes. In a URL it is %F0%9F%94%99.
- How do I write U+1F519 in JavaScript or Python?
- JavaScript: \u{1F519} or \uD83D\uDD19. Python: \U0001F519.
Source
Unicode Character Database 18.0.0 (Unicode License v3) and the Unicode emoji test data; HTML entity names from the WHATWG HTML Standard (CC BY 4.0). The encodings above are computed from the code point and checked against Python's encoders. How the character looks depends on your fonts.
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