π is the Unicode character MATHEMATICAL BOLD SMALL OMICRON, code point U+1D6D0 (decimal 120528) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝛐, and in UTF-8 it is the 4 bytes F0 9D 9B 90.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D6D0 |
| Decimal | 120528 |
| UTF-8 bytes | F0 9D 9B 90 |
| UTF-16 (big-endian) | D835 DED0 |
| UTF-32 | 0001D6D0 |
| HTML decimal | 𝛐 |
| HTML hex | 𝛐 |
| CSS | \1D6D0 |
| JavaScript | \u{1D6D0} or \uD835\uDED0 |
| JSON | \uD835\uDED0 |
| Python | \U0001D6D0 |
| Python by name | \N{MATHEMATICAL BOLD SMALL OMICRON} |
| Java, C# | \uD835\uDED0 |
| Rust, Swift | \u{1D6D0} |
| Go, C, C++ | \U0001D6D0 |
| URL (percent-encoded) | %F0%9D%9B%90 |
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 BOLD SMALL OMICRON |
| Code point | U+1D6D0 (decimal 120528) |
| 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 BOLD SMALL OMICRON 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+1D6C8 Mathematical Bold Small Eta
- π U+1D6C9 Mathematical Bold Small Theta
- π U+1D6CA Mathematical Bold Small Iota
- π U+1D6CB Mathematical Bold Small Kappa
- π U+1D6CC Mathematical Bold Small Lamda
- π U+1D6CD Mathematical Bold Small Mu
- π U+1D6CE Mathematical Bold Small Nu
- π U+1D6CF Mathematical Bold Small Xi
- π U+1D6D1 Mathematical Bold Small Pi
- π U+1D6D2 Mathematical Bold Small Rho
- π U+1D6D3 Mathematical Bold Small Final Sigma
- π U+1D6D4 Mathematical Bold Small Sigma
- π U+1D6D5 Mathematical Bold Small Tau
- π U+1D6D6 Mathematical Bold Small Upsilon
- π U+1D6D7 Mathematical Bold Small Phi
- π U+1D6D8 Mathematical Bold Small Chi
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝛐 (decimal) or 𝛐 (hex).
- What is the UTF-8 encoding of U+1D6D0?
- F0 9D 9B 90 (hex), 4 bytes. In a URL it is %F0%9D%9B%90.
- How do I write U+1D6D0 in JavaScript or Python?
- JavaScript: \u{1D6D0} or \uD835\uDED0. Python: \U0001D6D0.
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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