π is the Unicode emoji KEYCAP TEN (βkeycap: 10β), code point U+1F51F (decimal 128287) 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 9F.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1F51F |
| Decimal | 128287 |
| UTF-8 bytes | F0 9F 94 9F |
| UTF-16 (big-endian) | D83D DD1F |
| UTF-32 | 0001F51F |
| HTML decimal | 🔟 |
| HTML hex | 🔟 |
| CSS | \1F51F |
| JavaScript | \u{1F51F} or \uD83D\uDD1F |
| JSON | \uD83D\uDD1F |
| Python | \U0001F51F |
| Python by name | \N{KEYCAP TEN} |
| Java, C# | \uD83D\uDD1F |
| Rust, Swift | \u{1F51F} |
| Go, C, C++ | \U0001F51F |
| URL (percent-encoded) | %F0%9F%94%9F |
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 | KEYCAP TEN |
| Emoji name | keycap: 10 |
| Code point | U+1F51F (decimal 128287) |
| 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+1F517 Link
- π U+1F518 Radio button
- π U+1F519 BACK arrow
- 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+1F520 Input latin uppercase
- π‘ U+1F521 Input latin lowercase
- π’ U+1F522 Input numbers
- π£ U+1F523 Input symbols
- π€ U+1F524 Input latin letters
- π₯ U+1F525 Fire
- π¦ U+1F526 Flashlight
- π§ U+1F527 Wrench
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+1F51F?
- F0 9F 94 9F (hex), 4 bytes. In a URL it is %F0%9F%94%9F.
- How do I write U+1F51F in JavaScript or Python?
- JavaScript: \u{1F51F} or \uD83D\uDD1F. Python: \U0001F51F.
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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