π· is the Unicode character MATHEMATICAL MONOSPACE DIGIT ONE, code point U+1D7F7 (decimal 120823) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝟷, and in UTF-8 it is the 4 bytes F0 9D 9F B7.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D7F7 |
| Decimal | 120823 |
| UTF-8 bytes | F0 9D 9F B7 |
| UTF-16 (big-endian) | D835 DFF7 |
| UTF-32 | 0001D7F7 |
| HTML decimal | 𝟷 |
| HTML hex | 𝟷 |
| CSS | \1D7F7 |
| JavaScript | \u{1D7F7} or \uD835\uDFF7 |
| JSON | \uD835\uDFF7 |
| Python | \U0001D7F7 |
| Python by name | \N{MATHEMATICAL MONOSPACE DIGIT ONE} |
| Java, C# | \uD835\uDFF7 |
| Rust, Swift | \u{1D7F7} |
| Go, C, C++ | \U0001D7F7 |
| URL (percent-encoded) | %F0%9D%9F%B7 |
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 | MATHEMATICAL MONOSPACE DIGIT ONE |
| Code point | U+1D7F7 (decimal 120823) |
| Block | Mathematical Alphanumeric Symbols (U+1D400βU+1D7FF) |
| General category | Nd: Decimal digit |
| Script | Common |
| Bidirectional class | EN: European number |
| Numeric value | 1 |
| Mirrored in right-to-left text | No |
| First in Unicode version | 3.1 |
Decomposition
MATHEMATICAL MONOSPACE DIGIT ONE has a compatibility decomposition (font) to the sequence below. NFKC and NFKD normalisation replace it with that sequence, which can change how text looks, so use them for search, not for storage.
Nearby in Mathematical Alphanumeric Symbols
- π― U+1D7EF Mathematical Sans-Serif Bold Digit Three
- π° U+1D7F0 Mathematical Sans-Serif Bold Digit Four
- π± U+1D7F1 Mathematical Sans-Serif Bold Digit Five
- π² U+1D7F2 Mathematical Sans-Serif Bold Digit Six
- π³ U+1D7F3 Mathematical Sans-Serif Bold Digit Seven
- π΄ U+1D7F4 Mathematical Sans-Serif Bold Digit Eight
- π΅ U+1D7F5 Mathematical Sans-Serif Bold Digit Nine
- πΆ U+1D7F6 Mathematical Monospace Digit Zero
- πΈ U+1D7F8 Mathematical Monospace Digit Two
- πΉ U+1D7F9 Mathematical Monospace Digit Three
- πΊ U+1D7FA Mathematical Monospace Digit Four
- π» U+1D7FB Mathematical Monospace Digit Five
- πΌ U+1D7FC Mathematical Monospace Digit Six
- π½ U+1D7FD Mathematical Monospace Digit Seven
- πΎ U+1D7FE Mathematical Monospace Digit Eight
- πΏ U+1D7FF Mathematical Monospace Digit Nine
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π·?
- Use 𝟷 (decimal) or 𝟷 (hex).
- What is the UTF-8 encoding of U+1D7F7?
- F0 9D 9F B7 (hex), 4 bytes. In a URL it is %F0%9D%9F%B7.
- How do I write U+1D7F7 in JavaScript or Python?
- JavaScript: \u{1D7F7} or \uD835\uDFF7. Python: \U0001D7F7.
Source
Unicode Character Database 18.0.0 (Unicode License v3); 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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