π is the Unicode character MATHEMATICAL BOLD CAPITAL V, code point U+1D415 (decimal 119829) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝐕, and in UTF-8 it is the 4 bytes F0 9D 90 95.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D415 |
| Decimal | 119829 |
| UTF-8 bytes | F0 9D 90 95 |
| UTF-16 (big-endian) | D835 DC15 |
| UTF-32 | 0001D415 |
| HTML decimal | 𝐕 |
| HTML hex | 𝐕 |
| CSS | \1D415 |
| JavaScript | \u{1D415} or \uD835\uDC15 |
| JSON | \uD835\uDC15 |
| Python | \U0001D415 |
| Python by name | \N{MATHEMATICAL BOLD CAPITAL V} |
| Java, C# | \uD835\uDC15 |
| Rust, Swift | \u{1D415} |
| Go, C, C++ | \U0001D415 |
| URL (percent-encoded) | %F0%9D%90%95 |
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 CAPITAL V |
| Code point | U+1D415 (decimal 119829) |
| 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 BOLD CAPITAL V 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+1D40D Mathematical Bold Capital N
- π U+1D40E Mathematical Bold Capital O
- π U+1D40F Mathematical Bold Capital P
- π U+1D410 Mathematical Bold Capital Q
- π U+1D411 Mathematical Bold Capital R
- π U+1D412 Mathematical Bold Capital S
- π U+1D413 Mathematical Bold Capital T
- π U+1D414 Mathematical Bold Capital U
- π U+1D416 Mathematical Bold Capital W
- π U+1D417 Mathematical Bold Capital X
- π U+1D418 Mathematical Bold Capital Y
- π U+1D419 Mathematical Bold Capital Z
- π U+1D41A Mathematical Bold Small A
- π U+1D41B Mathematical Bold Small B
- π U+1D41C Mathematical Bold Small C
- π U+1D41D Mathematical Bold Small D
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝐕 (decimal) or 𝐕 (hex).
- What is the UTF-8 encoding of U+1D415?
- F0 9D 90 95 (hex), 4 bytes. In a URL it is %F0%9D%90%95.
- How do I write U+1D415 in JavaScript or Python?
- JavaScript: \u{1D415} or \uD835\uDC15. Python: \U0001D415.
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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