U+21A3 · Math symbol
HTML entity
↣
LaTeX
\rightarrowtail
Rightwards Arrow With Tail Symbol ↣
↣ is rightwards arrow with tail. 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 total injection
Unicode 1.0 called this character right arrow with tail. The standard renamed it later, but documents, fonts and font-editing tools from that era still use the old name.
Codes & technical data
| Unicode | U+21A3 | |
|---|---|---|
| HTML hex | ↣ | |
| HTML decimal | ↣ | |
| CSS | \21A3 | |
| JavaScript | \u{21A3} | |
| Python | \U000021A3 | |
| Java / C# | \u21A3 | |
| Rust | \u{21a3} | |
| Swift | \u{21A3} | |
| PHP | \u{21A3} | |
| URL encoded | %E2%86%A3 | |
| UTF-8 bytes | E2 86 A3 | |
| UTF-16 bytes | 21A3 | |
| Base64 | 4oaj | |
| Decimal | 8611 | |
| HTML entity | ↣ | |
| LaTeX | \rightarrowtail | |
| 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.
Other tail characters
Unicode names 12 characters ending in “tail”. They differ by direction, weight or decoration rather than by meaning.
Nearby in Arrows
The core arrow set: every direction, plus doubled, dashed, hooked and looped variants. Anything not here is in one of the four supplemental arrow blocks, which exist because this one filled up.
How to type ↣
| Windows | Type 21A3 then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “rightwards arrow with tail” |
| Linux | Press Ctrl+Shift+U, type 21a3, 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 ↣ rightwards arrow with tail symbol?
- On Windows, type 21A3 and press Alt+X. On Linux press Ctrl+Shift+U then 21a3. On any system the quickest route is the copy button on this page.
- What is the code for ↣?
- Rightwards Arrow With Tail is U+21A3, written in HTML as ↣ and in LaTeX as \rightarrowtail. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ↣?
- Rightwards Arrow With Tail is filed under Math symbol in the Arrows 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.