π is the Unicode character MATHEMATICAL SANS-SERIF SMALL I, code point U+1D5C2 (decimal 120258) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝗂, and in UTF-8 it is the 4 bytes F0 9D 97 82.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D5C2 |
| Decimal | 120258 |
| UTF-8 bytes | F0 9D 97 82 |
| UTF-16 (big-endian) | D835 DDC2 |
| UTF-32 | 0001D5C2 |
| HTML decimal | 𝗂 |
| HTML hex | 𝗂 |
| CSS | \1D5C2 |
| JavaScript | \u{1D5C2} or \uD835\uDDC2 |
| JSON | \uD835\uDDC2 |
| Python | \U0001D5C2 |
| Python by name | \N{MATHEMATICAL SANS-SERIF SMALL I} |
| Java, C# | \uD835\uDDC2 |
| Rust, Swift | \u{1D5C2} |
| Go, C, C++ | \U0001D5C2 |
| URL (percent-encoded) | %F0%9D%97%82 |
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 SMALL I |
| Code point | U+1D5C2 (decimal 120258) |
| 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 SANS-SERIF SMALL I 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
- πΊ U+1D5BA Mathematical Sans-Serif Small A
- π» U+1D5BB Mathematical Sans-Serif Small B
- πΌ U+1D5BC Mathematical Sans-Serif Small C
- π½ U+1D5BD Mathematical Sans-Serif Small D
- πΎ U+1D5BE Mathematical Sans-Serif Small E
- πΏ U+1D5BF Mathematical Sans-Serif Small F
- π U+1D5C0 Mathematical Sans-Serif Small G
- π U+1D5C1 Mathematical Sans-Serif Small H
- π U+1D5C3 Mathematical Sans-Serif Small J
- π U+1D5C4 Mathematical Sans-Serif Small K
- π U+1D5C5 Mathematical Sans-Serif Small L
- π U+1D5C6 Mathematical Sans-Serif Small M
- π U+1D5C7 Mathematical Sans-Serif Small N
- π U+1D5C8 Mathematical Sans-Serif Small O
- π U+1D5C9 Mathematical Sans-Serif Small P
- π U+1D5CA Mathematical Sans-Serif Small Q
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝗂 (decimal) or 𝗂 (hex).
- What is the UTF-8 encoding of U+1D5C2?
- F0 9D 97 82 (hex), 4 bytes. In a URL it is %F0%9D%97%82.
- How do I write U+1D5C2 in JavaScript or Python?
- JavaScript: \u{1D5C2} or \uD835\uDDC2. Python: \U0001D5C2.
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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