π is the Unicode character MATHEMATICAL FRAKTUR CAPITAL T, code point U+1D517 (decimal 120087) 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 94 97.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D517 |
| Decimal | 120087 |
| UTF-8 bytes | F0 9D 94 97 |
| UTF-16 (big-endian) | D835 DD17 |
| UTF-32 | 0001D517 |
| HTML decimal | 𝔗 |
| HTML hex | 𝔗 |
| HTML named | 𝔗 |
| CSS | \1D517 |
| JavaScript | \u{1D517} or \uD835\uDD17 |
| JSON | \uD835\uDD17 |
| Python | \U0001D517 |
| Python by name | \N{MATHEMATICAL FRAKTUR CAPITAL T} |
| Java, C# | \uD835\uDD17 |
| Rust, Swift | \u{1D517} |
| Go, C, C++ | \U0001D517 |
| URL (percent-encoded) | %F0%9D%94%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 FRAKTUR CAPITAL T |
| Code point | U+1D517 (decimal 120087) |
| 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 FRAKTUR CAPITAL 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+1D50E Mathematical Fraktur Capital K
- π U+1D50F Mathematical Fraktur Capital L
- π U+1D510 Mathematical Fraktur Capital M
- π U+1D511 Mathematical Fraktur Capital N
- π U+1D512 Mathematical Fraktur Capital O
- π U+1D513 Mathematical Fraktur Capital P
- π U+1D514 Mathematical Fraktur Capital Q
- π U+1D516 Mathematical Fraktur Capital S
- π U+1D518 Mathematical Fraktur Capital U
- π U+1D519 Mathematical Fraktur Capital V
- π U+1D51A Mathematical Fraktur Capital W
- π U+1D51B Mathematical Fraktur Capital X
- π U+1D51C Mathematical Fraktur Capital Y
- π U+1D51E Mathematical Fraktur Small A
- π U+1D51F Mathematical Fraktur Small B
- π U+1D520 Mathematical Fraktur Small C
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use the named entity 𝔗, or 𝔗 (decimal) or 𝔗 (hex).
- What is the UTF-8 encoding of U+1D517?
- F0 9D 94 97 (hex), 4 bytes. In a URL it is %F0%9D%94%97.
- How do I write U+1D517 in JavaScript or Python?
- JavaScript: \u{1D517} or \uD835\uDD17. Python: \U0001D517.
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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