π is the Unicode character MATHEMATICAL ITALIC SMALL EPSILON, code point U+1D700 (decimal 120576) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝜀, and in UTF-8 it is the 4 bytes F0 9D 9C 80.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D700 |
| Decimal | 120576 |
| UTF-8 bytes | F0 9D 9C 80 |
| UTF-16 (big-endian) | D835 DF00 |
| UTF-32 | 0001D700 |
| HTML decimal | 𝜀 |
| HTML hex | 𝜀 |
| CSS | \1D700 |
| JavaScript | \u{1D700} or \uD835\uDF00 |
| JSON | \uD835\uDF00 |
| Python | \U0001D700 |
| Python by name | \N{MATHEMATICAL ITALIC SMALL EPSILON} |
| Java, C# | \uD835\uDF00 |
| Rust, Swift | \u{1D700} |
| Go, C, C++ | \U0001D700 |
| URL (percent-encoded) | %F0%9D%9C%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 ITALIC SMALL EPSILON |
| Code point | U+1D700 (decimal 120576) |
| 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 ITALIC SMALL EPSILON 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+1D6F8 Mathematical Italic Capital Chi
- πΉ U+1D6F9 Mathematical Italic Capital Psi
- πΊ U+1D6FA Mathematical Italic Capital Omega
- π» U+1D6FB Mathematical Italic Nabla
- πΌ U+1D6FC Mathematical Italic Small Alpha
- π½ U+1D6FD Mathematical Italic Small Beta
- πΎ U+1D6FE Mathematical Italic Small Gamma
- πΏ U+1D6FF Mathematical Italic Small Delta
- π U+1D701 Mathematical Italic Small Zeta
- π U+1D702 Mathematical Italic Small Eta
- π U+1D703 Mathematical Italic Small Theta
- π U+1D704 Mathematical Italic Small Iota
- π U+1D705 Mathematical Italic Small Kappa
- π U+1D706 Mathematical Italic Small Lamda
- π U+1D707 Mathematical Italic Small Mu
- π U+1D708 Mathematical Italic Small Nu
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝜀 (decimal) or 𝜀 (hex).
- What is the UTF-8 encoding of U+1D700?
- F0 9D 9C 80 (hex), 4 bytes. In a URL it is %F0%9D%9C%80.
- How do I write U+1D700 in JavaScript or Python?
- JavaScript: \u{1D700} or \uD835\uDF00. Python: \U0001D700.
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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