π is the Unicode character MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL THETA, code point U+1D797 (decimal 120727) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝞗, and in UTF-8 it is the 4 bytes F0 9D 9E 97.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D797 |
| Decimal | 120727 |
| UTF-8 bytes | F0 9D 9E 97 |
| UTF-16 (big-endian) | D835 DF97 |
| UTF-32 | 0001D797 |
| HTML decimal | 𝞗 |
| HTML hex | 𝞗 |
| CSS | \1D797 |
| JavaScript | \u{1D797} or \uD835\uDF97 |
| JSON | \uD835\uDF97 |
| Python | \U0001D797 |
| Python by name | \N{MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL THETA} |
| Java, C# | \uD835\uDF97 |
| Rust, Swift | \u{1D797} |
| Go, C, C++ | \U0001D797 |
| URL (percent-encoded) | %F0%9D%9E%97 |
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 CAPITAL THETA |
| Code point | U+1D797 (decimal 120727) |
| 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 ITALIC CAPITAL THETA 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+1D78F Mathematical Sans-Serif Bold Pi Symbol
- π U+1D790 Mathematical Sans-Serif Bold Italic Capital Alpha
- π U+1D791 Mathematical Sans-Serif Bold Italic Capital Beta
- π U+1D792 Mathematical Sans-Serif Bold Italic Capital Gamma
- π U+1D793 Mathematical Sans-Serif Bold Italic Capital Delta
- π U+1D794 Mathematical Sans-Serif Bold Italic Capital Epsilon
- π U+1D795 Mathematical Sans-Serif Bold Italic Capital Zeta
- π U+1D796 Mathematical Sans-Serif Bold Italic Capital Eta
- π U+1D798 Mathematical Sans-Serif Bold Italic Capital Iota
- π U+1D799 Mathematical Sans-Serif Bold Italic Capital Kappa
- π U+1D79A Mathematical Sans-Serif Bold Italic Capital Lamda
- π U+1D79B Mathematical Sans-Serif Bold Italic Capital Mu
- π U+1D79C Mathematical Sans-Serif Bold Italic Capital Nu
- π U+1D79D Mathematical Sans-Serif Bold Italic Capital Xi
- π U+1D79E Mathematical Sans-Serif Bold Italic Capital Omicron
- π U+1D79F Mathematical Sans-Serif Bold Italic Capital Pi
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝞗 (decimal) or 𝞗 (hex).
- What is the UTF-8 encoding of U+1D797?
- F0 9D 9E 97 (hex), 4 bytes. In a URL it is %F0%9D%9E%97.
- How do I write U+1D797 in JavaScript or Python?
- JavaScript: \u{1D797} or \uD835\uDF97. Python: \U0001D797.
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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