More
More
Set Minus HTML entity ∖
∖ is the HTML entity for Set Minus ∖ (U+2216). Copy the decimal ∖ and hex ∖ codes plus CSS, JavaScript, Python and URL escapes.
- Entity
∖- Also written
∖∖∖∖- Code point
- U+2216
- Unicode name
- SET MINUS
- Block
- Mathematical Operators
- Category
- Math symbol (Sm)
- Since
- Unicode 1.1
- Defined in
- HTML5
Codes to copy
| HTML named | ∖Works in HTML; in XML only & < > " ' are predefined. | |
|---|---|---|
| HTML decimal | ∖Works in HTML and XML. | |
| HTML hex | ∖Works in HTML and XML. | |
| CSS | content: "\2216";In a stylesheet, for ::before and ::after. | |
| JavaScript | "\u2216"Also valid in JSON. | |
| Python | "\u2216"Python 3 string literal. | |
| Python by name | "\N{SET MINUS}"Readable alternative using the Unicode name. | |
| URL | %E2%88%96Percent-encoded UTF-8 bytes, for a path or query value. | |
| UTF-8 bytes | E2 88 963 bytes. | |
| UTF-16 | 22161 code unit, which is what JavaScript length counts. |
When to use it
∖ writes U+2216 (Set Minus), a maths symbol from the Unicode Mathematical Operators block, encoded since Unicode 1.1. For more than a symbol or two, MathML, supported in all major browsers since 2023, gives proper maths spacing and layout.
The name comes from the HTML5 list (much of it shared with MathML), so it works in every current browser but not in XML or XHTML served as XML, where the numeric reference is the safe choice.
More maths operators
∘Ring Operator∓Minus-Or-Plus Sign√Square Root Sign−Minus Sign∝Proportional to∑Summation Sign∞Infinity∐N-Ary Coproduct
All maths operators · Every HTML entity · Encode or decode text
Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).