U+2A1B · Math symbol
LaTeX
\upint
Integral With Overbar Symbol ⨛
⨛ is integral with overbar, U+2A1B. Unicode also records it as “upper integral”. It was added in Unicode 3.2, and Unicode files it under Math symbol.
Also known as
- upper integral
Codes & technical data
| Unicode | U+2A1B | |
|---|---|---|
| HTML hex | ⨛ | |
| HTML decimal | ⨛ | |
| CSS | \2A1B | |
| JavaScript | \u{2A1B} | |
| Python | \U00002A1B | |
| Java / C# | \u2A1B | |
| Rust | \u{2a1b} | |
| Swift | \u{2A1B} | |
| PHP | \u{2A1B} | |
| URL encoded | %E2%A8%9B | |
| UTF-8 bytes | E2 A8 9B | |
| UTF-16 bytes | 2A1B | |
| Base64 | 4qib | |
| Decimal | 10779 | |
| LaTeX | \upint | |
| Category | Math symbol (Sm) | |
| Introduced | Unicode 3.2 | |
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.
Other overbar characters
Unicode names 12 characters ending in “overbar”. They differ by direction, weight or decoration rather than by meaning.
Nearby in Supplemental Mathematical Operators
A second full block of operators: n-ary forms, integrals with modifiers, and the dense family of comparison relations that differ only in the slant or stroke of the equals bar.
How to type ⨛
| Windows | Type 2A1B then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “integral with overbar” |
| Linux | Press Ctrl+Shift+U, type 2a1b, 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 ⨛ integral with overbar symbol?
- On Windows, type 2A1B and press Alt+X. On Linux press Ctrl+Shift+U then 2a1b. On any system the quickest route is the copy button on this page.
- What is the code for ⨛?
- Integral With Overbar is U+2A1B and in LaTeX as \upint. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⨛?
- Integral With Overbar is filed under Math symbol in the Supplemental Mathematical Operators block, and was introduced in Unicode 3.2. 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.