π¬ is the Unicode character LEIBNIZIAN EQUALS SIGN WITH DOUBLE VERTICALS, code point U+1DB01 (decimal 121601) in the Miscellaneous Symbols and Arrows Extended block, added in Unicode 18.0. In HTML write 𝬁, and in UTF-8 it is the 4 bytes F0 9D AC 81.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1DB01 |
| Decimal | 121601 |
| UTF-8 bytes | F0 9D AC 81 |
| UTF-16 (big-endian) | D836 DF01 |
| UTF-32 | 0001DB01 |
| HTML decimal | 𝬁 |
| HTML hex | 𝬁 |
| CSS | \1DB01 |
| JavaScript | \u{1DB01} or \uD836\uDF01 |
| JSON | \uD836\uDF01 |
| Python | \U0001DB01 |
| Python by name | \N{LEIBNIZIAN EQUALS SIGN WITH DOUBLE VERTICALS} |
| Java, C# | \uD836\uDF01 |
| Rust, Swift | \u{1DB01} |
| Go, C, C++ | \U0001DB01 |
| URL (percent-encoded) | %F0%9D%AC%81 |
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 | LEIBNIZIAN EQUALS SIGN WITH DOUBLE VERTICALS |
| Code point | U+1DB01 (decimal 121601) |
| Block | Miscellaneous Symbols and Arrows Extended (U+1DB00βU+1DBFF) |
| General category | Sm: Math symbol |
| Script | Common |
| Bidirectional class | ON: Other neutral |
| Mirrored in right-to-left text | No |
| First in Unicode version | 18.0 |
Nearby in Miscellaneous Symbols and Arrows Extended
- π¬ U+1DB00 Leibnizian Equals Sign
- π¬ U+1DB02 Leibnizian Equals Sign With Small S
- π¬ U+1DB03 Leibnizian Greater-Than
- π¬ U+1DB04 Leibnizian Less-Than
- π¬ U+1DB05 Leibnizian Greater-Than With Small P
- π¬ U+1DB06 Leibnizian Less-Than With Small P
- π¬ U+1DB07 Leibnizian Greater-Than Or Less-Than
- π¬ U+1DB08 Inverted Square Left Open Box Operator
- π¬ U+1DB09 Inverted Square Right Open Box Operator
All 29 characters: Miscellaneous Symbols and Arrows Extended.
Official reference
Questions people ask
- What is the HTML code for π¬?
- Use 𝬁 (decimal) or 𝬁 (hex).
- What is the UTF-8 encoding of U+1DB01?
- F0 9D AC 81 (hex), 4 bytes. In a URL it is %F0%9D%AC%81.
- How do I write U+1DB01 in JavaScript or Python?
- JavaScript: \u{1DB01} or \uD836\uDF01. Python: \U0001DB01.
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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