U+2904 · Math symbol
HTML entity
⤄
LaTeX
\nvLeftrightarrow
Left Right Double Arrow With Vertical Stroke Symbol ⤄
⤄ is left right double arrow with vertical stroke. Write it in HTML as ⤄ or paste the character directly. It was added in Unicode 3.2, and Unicode files it under Math symbol.
Codes & technical data
| Unicode | U+2904 | |
|---|---|---|
| HTML hex | ⤄ | |
| HTML decimal | ⤄ | |
| CSS | \2904 | |
| JavaScript | \u{2904} | |
| Python | \U00002904 | |
| Java / C# | \u2904 | |
| Rust | \u{2904} | |
| Swift | \u{2904} | |
| PHP | \u{2904} | |
| URL encoded | %E2%A4%84 | |
| UTF-8 bytes | E2 A4 84 | |
| UTF-16 bytes | 2904 | |
| Base64 | 4qSE | |
| Decimal | 10500 | |
| HTML entity | ⤄ | |
| LaTeX | \nvLeftrightarrow | |
| 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 stroke characters
Unicode names 24 characters ending in “stroke”. They differ by direction, weight or decoration rather than by meaning.
Nearby in Supplemental Arrows-B
The large second arrow block: harpoons, arrows with hooks and tails, and the paired forms that commutative diagrams need.
How to type ⤄
| Windows | Type 2904 then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “left right double arrow with vertical stroke” |
| Linux | Press Ctrl+Shift+U, type 2904, 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 ⤄ left right double arrow with vertical stroke symbol?
- On Windows, type 2904 and press Alt+X. On Linux press Ctrl+Shift+U then 2904. On any system the quickest route is the copy button on this page.
- What is the code for ⤄?
- Left Right Double Arrow With Vertical Stroke is U+2904, written in HTML as ⤄ and in LaTeX as \nvLeftrightarrow. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⤄?
- Left Right Double Arrow With Vertical Stroke is filed under Math symbol in the Supplemental Arrows-B 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.