U+228E · Math symbol
HTML entity
⊎
LaTeX
\uplus
Multiset Union Symbol ⊎
⊎ is multiset union. Write it in HTML as ⊎ or paste the character directly. It was added in Unicode 1.1, and Unicode files it under Math symbol.
Also known as
- z notation bag addition
Codes & technical data
| Unicode | U+228E | |
|---|---|---|
| HTML hex | ⊎ | |
| HTML decimal | ⊎ | |
| CSS | \228E | |
| JavaScript | \u{228E} | |
| Python | \U0000228E | |
| Java / C# | \u228E | |
| Rust | \u{228e} | |
| Swift | \u{228E} | |
| PHP | \u{228E} | |
| URL encoded | %E2%8A%8E | |
| UTF-8 bytes | E2 8A 8E | |
| UTF-16 bytes | 228E | |
| Base64 | 4oqO | |
| Decimal | 8846 | |
| HTML entity | ⊎ | |
| LaTeX | \uplus | |
| Category | Math symbol (Sm) | |
| Introduced | Unicode 1.1 | |
Will ⊎ survive being pasted?
- Normalisation. Yes. ⊎ is unchanged by NFKC, so it survives normalising systems intact.
- Legacy encodings. ⊎ is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
- Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.
Unicode cross-references
The standard points readers of ⊎ at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.
Other union characters
Unicode names 7 characters ending in “union”. They differ by direction, weight or decoration rather than by meaning.
Nearby in Mathematical Operators
The operators mathematics and programming share — set theory, logic, calculus, comparison. Almost every character here has a LaTeX command, which is usually the fastest way to name the one you mean.
How to type ⊎
| Windows | Type 228E then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “multiset union” |
| Linux | Press Ctrl+Shift+U, type 228e, press Enter |
| HTML | ⊎ |
About Unicode’s Math symbol category
Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.
Frequently asked questions
- How do I type the ⊎ multiset union symbol?
- On Windows, type 228E and press Alt+X. On Linux press Ctrl+Shift+U then 228e. On any system the quickest route is the copy button on this page.
- What is the code for ⊎?
- Multiset Union is U+228E, written in HTML as ⊎ and in LaTeX as \uplus. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⊎?
- Multiset Union is filed under Math symbol in the Mathematical Operators block, and was introduced in Unicode 1.1. Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.