π is the Unicode character MATHEMATICAL SANS-SERIF ITALIC CAPITAL Q, code point U+1D618 (decimal 120344) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝘘, and in UTF-8 it is the 4 bytes F0 9D 98 98.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D618 |
| Decimal | 120344 |
| UTF-8 bytes | F0 9D 98 98 |
| UTF-16 (big-endian) | D835 DE18 |
| UTF-32 | 0001D618 |
| HTML decimal | 𝘘 |
| HTML hex | 𝘘 |
| CSS | \1D618 |
| JavaScript | \u{1D618} or \uD835\uDE18 |
| JSON | \uD835\uDE18 |
| Python | \U0001D618 |
| Python by name | \N{MATHEMATICAL SANS-SERIF ITALIC CAPITAL Q} |
| Java, C# | \uD835\uDE18 |
| Rust, Swift | \u{1D618} |
| Go, C, C++ | \U0001D618 |
| URL (percent-encoded) | %F0%9D%98%98 |
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 ITALIC CAPITAL Q |
| Code point | U+1D618 (decimal 120344) |
| 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 ITALIC CAPITAL Q 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+1D610 Mathematical Sans-Serif Italic Capital I
- π U+1D611 Mathematical Sans-Serif Italic Capital J
- π U+1D612 Mathematical Sans-Serif Italic Capital K
- π U+1D613 Mathematical Sans-Serif Italic Capital L
- π U+1D614 Mathematical Sans-Serif Italic Capital M
- π U+1D615 Mathematical Sans-Serif Italic Capital N
- π U+1D616 Mathematical Sans-Serif Italic Capital O
- π U+1D617 Mathematical Sans-Serif Italic Capital P
- π U+1D619 Mathematical Sans-Serif Italic Capital R
- π U+1D61A Mathematical Sans-Serif Italic Capital S
- π U+1D61B Mathematical Sans-Serif Italic Capital T
- π U+1D61C Mathematical Sans-Serif Italic Capital U
- π U+1D61D Mathematical Sans-Serif Italic Capital V
- π U+1D61E Mathematical Sans-Serif Italic Capital W
- π U+1D61F Mathematical Sans-Serif Italic Capital X
- π U+1D620 Mathematical Sans-Serif Italic Capital Y
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝘘 (decimal) or 𝘘 (hex).
- What is the UTF-8 encoding of U+1D618?
- F0 9D 98 98 (hex), 4 bytes. In a URL it is %F0%9D%98%98.
- How do I write U+1D618 in JavaScript or Python?
- JavaScript: \u{1D618} or \uD835\uDE18. Python: \U0001D618.
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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