π is the Unicode character MATHEMATICAL BOLD FRAKTUR SMALL T, code point U+1D599 (decimal 120217) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝖙, and in UTF-8 it is the 4 bytes F0 9D 96 99.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D599 |
| Decimal | 120217 |
| UTF-8 bytes | F0 9D 96 99 |
| UTF-16 (big-endian) | D835 DD99 |
| UTF-32 | 0001D599 |
| HTML decimal | 𝖙 |
| HTML hex | 𝖙 |
| CSS | \1D599 |
| JavaScript | \u{1D599} or \uD835\uDD99 |
| JSON | \uD835\uDD99 |
| Python | \U0001D599 |
| Python by name | \N{MATHEMATICAL BOLD FRAKTUR SMALL T} |
| Java, C# | \uD835\uDD99 |
| Rust, Swift | \u{1D599} |
| Go, C, C++ | \U0001D599 |
| URL (percent-encoded) | %F0%9D%96%99 |
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 FRAKTUR SMALL T |
| Code point | U+1D599 (decimal 120217) |
| 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 FRAKTUR SMALL T 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+1D591 Mathematical Bold Fraktur Small L
- π U+1D592 Mathematical Bold Fraktur Small M
- π U+1D593 Mathematical Bold Fraktur Small N
- π U+1D594 Mathematical Bold Fraktur Small O
- π U+1D595 Mathematical Bold Fraktur Small P
- π U+1D596 Mathematical Bold Fraktur Small Q
- π U+1D597 Mathematical Bold Fraktur Small R
- π U+1D598 Mathematical Bold Fraktur Small S
- π U+1D59A Mathematical Bold Fraktur Small U
- π U+1D59B Mathematical Bold Fraktur Small V
- π U+1D59C Mathematical Bold Fraktur Small W
- π U+1D59D Mathematical Bold Fraktur Small X
- π U+1D59E Mathematical Bold Fraktur Small Y
- π U+1D59F Mathematical Bold Fraktur Small Z
- π U+1D5A0 Mathematical Sans-Serif Capital A
- π‘ U+1D5A1 Mathematical Sans-Serif Capital B
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝖙 (decimal) or 𝖙 (hex).
- What is the UTF-8 encoding of U+1D599?
- F0 9D 96 99 (hex), 4 bytes. In a URL it is %F0%9D%96%99.
- How do I write U+1D599 in JavaScript or Python?
- JavaScript: \u{1D599} or \uD835\uDD99. Python: \U0001D599.
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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