π is the Unicode character MATHEMATICAL BOLD SMALL ZETA, code point U+1D6C7 (decimal 120519) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝛇, and in UTF-8 it is the 4 bytes F0 9D 9B 87.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D6C7 |
| Decimal | 120519 |
| UTF-8 bytes | F0 9D 9B 87 |
| UTF-16 (big-endian) | D835 DEC7 |
| UTF-32 | 0001D6C7 |
| HTML decimal | 𝛇 |
| HTML hex | 𝛇 |
| CSS | \1D6C7 |
| JavaScript | \u{1D6C7} or \uD835\uDEC7 |
| JSON | \uD835\uDEC7 |
| Python | \U0001D6C7 |
| Python by name | \N{MATHEMATICAL BOLD SMALL ZETA} |
| Java, C# | \uD835\uDEC7 |
| Rust, Swift | \u{1D6C7} |
| Go, C, C++ | \U0001D6C7 |
| URL (percent-encoded) | %F0%9D%9B%87 |
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 ZETA |
| Code point | U+1D6C7 (decimal 120519) |
| 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 ZETA 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
- πΏ U+1D6BF Mathematical Bold Capital Psi
- π U+1D6C0 Mathematical Bold Capital Omega
- π U+1D6C1 Mathematical Bold Nabla
- π U+1D6C2 Mathematical Bold Small Alpha
- π U+1D6C3 Mathematical Bold Small Beta
- π U+1D6C4 Mathematical Bold Small Gamma
- π U+1D6C5 Mathematical Bold Small Delta
- π U+1D6C6 Mathematical Bold Small Epsilon
- 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
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝛇 (decimal) or 𝛇 (hex).
- What is the UTF-8 encoding of U+1D6C7?
- F0 9D 9B 87 (hex), 4 bytes. In a URL it is %F0%9D%9B%87.
- How do I write U+1D6C7 in JavaScript or Python?
- JavaScript: \u{1D6C7} or \uD835\uDEC7. Python: \U0001D6C7.
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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