π is the Unicode character MATHEMATICAL SANS-SERIF BOLD ITALIC SMALL CHI, code point U+1D7C0 (decimal 120768) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝟀, and in UTF-8 it is the 4 bytes F0 9D 9F 80.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D7C0 |
| Decimal | 120768 |
| UTF-8 bytes | F0 9D 9F 80 |
| UTF-16 (big-endian) | D835 DFC0 |
| UTF-32 | 0001D7C0 |
| HTML decimal | 𝟀 |
| HTML hex | 𝟀 |
| CSS | \1D7C0 |
| JavaScript | \u{1D7C0} or \uD835\uDFC0 |
| JSON | \uD835\uDFC0 |
| Python | \U0001D7C0 |
| Python by name | \N{MATHEMATICAL SANS-SERIF BOLD ITALIC SMALL CHI} |
| Java, C# | \uD835\uDFC0 |
| Rust, Swift | \u{1D7C0} |
| Go, C, C++ | \U0001D7C0 |
| URL (percent-encoded) | %F0%9D%9F%80 |
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 SANS-SERIF BOLD ITALIC SMALL CHI |
| Code point | U+1D7C0 (decimal 120768) |
| Block | Mathematical Alphanumeric Symbols (U+1D400βU+1D7FF) |
| General category | Ll: Lowercase letter |
| Script | Common |
| Bidirectional class | L: Left-to-right |
| Mirrored in right-to-left text | No |
| First in Unicode version | 3.1 |
Decomposition
MATHEMATICAL SANS-SERIF BOLD ITALIC SMALL CHI 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
- πΈ U+1D7B8 Mathematical Sans-Serif Bold Italic Small Omicron
- πΉ U+1D7B9 Mathematical Sans-Serif Bold Italic Small Pi
- πΊ U+1D7BA Mathematical Sans-Serif Bold Italic Small Rho
- π» U+1D7BB Mathematical Sans-Serif Bold Italic Small Final Sigma
- πΌ U+1D7BC Mathematical Sans-Serif Bold Italic Small Sigma
- π½ U+1D7BD Mathematical Sans-Serif Bold Italic Small Tau
- πΎ U+1D7BE Mathematical Sans-Serif Bold Italic Small Upsilon
- πΏ U+1D7BF Mathematical Sans-Serif Bold Italic Small Phi
- π U+1D7C1 Mathematical Sans-Serif Bold Italic Small Psi
- π U+1D7C2 Mathematical Sans-Serif Bold Italic Small Omega
- π U+1D7C3 Mathematical Sans-Serif Bold Italic Partial Differential
- π U+1D7C4 Mathematical Sans-Serif Bold Italic Epsilon Symbol
- π U+1D7C5 Mathematical Sans-Serif Bold Italic Theta Symbol
- π U+1D7C6 Mathematical Sans-Serif Bold Italic Kappa Symbol
- π U+1D7C7 Mathematical Sans-Serif Bold Italic Phi Symbol
- π U+1D7C8 Mathematical Sans-Serif Bold Italic Rho Symbol
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝟀 (decimal) or 𝟀 (hex).
- What is the UTF-8 encoding of U+1D7C0?
- F0 9D 9F 80 (hex), 4 bytes. In a URL it is %F0%9D%9F%80.
- How do I write U+1D7C0 in JavaScript or Python?
- JavaScript: \u{1D7C0} or \uD835\uDFC0. Python: \U0001D7C0.
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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