π is the Unicode character MATHEMATICAL SANS-SERIF BOLD CAPITAL IOTA, code point U+1D75E (decimal 120670) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝝞, and in UTF-8 it is the 4 bytes F0 9D 9D 9E.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D75E |
| Decimal | 120670 |
| UTF-8 bytes | F0 9D 9D 9E |
| UTF-16 (big-endian) | D835 DF5E |
| UTF-32 | 0001D75E |
| HTML decimal | 𝝞 |
| HTML hex | 𝝞 |
| CSS | \1D75E |
| JavaScript | \u{1D75E} or \uD835\uDF5E |
| JSON | \uD835\uDF5E |
| Python | \U0001D75E |
| Python by name | \N{MATHEMATICAL SANS-SERIF BOLD CAPITAL IOTA} |
| Java, C# | \uD835\uDF5E |
| Rust, Swift | \u{1D75E} |
| Go, C, C++ | \U0001D75E |
| URL (percent-encoded) | %F0%9D%9D%9E |
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 CAPITAL IOTA |
| Code point | U+1D75E (decimal 120670) |
| Block | Mathematical Alphanumeric Symbols (U+1D400βU+1D7FF) |
| General category | Lu: Uppercase 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 CAPITAL IOTA 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+1D756 Mathematical Sans-Serif Bold Capital Alpha
- π U+1D757 Mathematical Sans-Serif Bold Capital Beta
- π U+1D758 Mathematical Sans-Serif Bold Capital Gamma
- π U+1D759 Mathematical Sans-Serif Bold Capital Delta
- π U+1D75A Mathematical Sans-Serif Bold Capital Epsilon
- π U+1D75B Mathematical Sans-Serif Bold Capital Zeta
- π U+1D75C Mathematical Sans-Serif Bold Capital Eta
- π U+1D75D Mathematical Sans-Serif Bold Capital Theta
- π U+1D75F Mathematical Sans-Serif Bold Capital Kappa
- π U+1D760 Mathematical Sans-Serif Bold Capital Lamda
- π‘ U+1D761 Mathematical Sans-Serif Bold Capital Mu
- π’ U+1D762 Mathematical Sans-Serif Bold Capital Nu
- π£ U+1D763 Mathematical Sans-Serif Bold Capital Xi
- π€ U+1D764 Mathematical Sans-Serif Bold Capital Omicron
- π₯ U+1D765 Mathematical Sans-Serif Bold Capital Pi
- π¦ U+1D766 Mathematical Sans-Serif Bold Capital Rho
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝝞 (decimal) or 𝝞 (hex).
- What is the UTF-8 encoding of U+1D75E?
- F0 9D 9D 9E (hex), 4 bytes. In a URL it is %F0%9D%9D%9E.
- How do I write U+1D75E in JavaScript or Python?
- JavaScript: \u{1D75E} or \uD835\uDF5E. Python: \U0001D75E.
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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