π is the Unicode emoji SQUARED SOS (βSOS buttonβ), code point U+1F198 (decimal 127384) in the Enclosed Alphanumeric Supplement block, added in Unicode 6.0. In HTML write 🆘, and in UTF-8 it is the 4 bytes F0 9F 86 98.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1F198 |
| Decimal | 127384 |
| UTF-8 bytes | F0 9F 86 98 |
| UTF-16 (big-endian) | D83C DD98 |
| UTF-32 | 0001F198 |
| HTML decimal | 🆘 |
| HTML hex | 🆘 |
| CSS | \1F198 |
| JavaScript | \u{1F198} or \uD83C\uDD98 |
| JSON | \uD83C\uDD98 |
| Python | \U0001F198 |
| Python by name | \N{SQUARED SOS} |
| Java, C# | \uD83C\uDD98 |
| Rust, Swift | \u{1F198} |
| Go, C, C++ | \U0001F198 |
| URL (percent-encoded) | %F0%9F%86%98 |
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 | SQUARED SOS |
| Emoji name | SOS button |
| Code point | U+1F198 (decimal 127384) |
| Block | Enclosed Alphanumeric Supplement (U+1F100βU+1F1FF) |
| General category | So: Other symbol |
| Script | Common |
| Bidirectional class | L: Left-to-right |
| Mirrored in right-to-left text | No |
| First in Unicode version | 6.0 |
Nearby in Enclosed Alphanumeric Supplement
- π U+1F190 Square Dj
- π U+1F191 CL button
- π U+1F192 COOL button
- π U+1F193 FREE button
- π U+1F194 ID button
- π U+1F195 NEW button
- π U+1F196 NG button
- π U+1F197 OK button
- π U+1F199 UP! button
- π U+1F19A VS button
- π U+1F19B Squared Three D
- π U+1F19C Squared Second Screen
- π U+1F19D Squared Two K
- π U+1F19E Squared Four K
- π U+1F19F Squared Eight K
- π U+1F1A0 Squared Five Point One
All 201 characters: Enclosed Alphanumeric Supplement.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 🆘 (decimal) or 🆘 (hex).
- What is the UTF-8 encoding of U+1F198?
- F0 9F 86 98 (hex), 4 bytes. In a URL it is %F0%9F%86%98.
- How do I write U+1F198 in JavaScript or Python?
- JavaScript: \u{1F198} or \uD83C\uDD98. Python: \U0001F198.
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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