β
Up Down Double Arrow Symbol (β)
Copy the Up Down Double Arrow symbol β to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does β mean?
The up down double arrow (β) is an arrow character from the Unicode Arrows block that points in both vertical directions. Double and triple arrows are used in logic for implication and equivalence, and in mathematics for strong or repeated relations.
Codes and properties
| Character | β |
|---|---|
| Unicode name | UP DOWN DOUBLE ARROW |
| Code point | U+21D5 |
| Decimal | 8661 |
| Unicode block | Arrows |
| HTML entity | ⇕ Β· ⇕ |
| CSS | \21D5 |
| JavaScript / JSON | \u21D5 |
| Python | \u21D5 or \N{UP DOWN DOUBLE ARROW} |
| UTF-8 bytes | E2 87 95 |
| LaTeX | \Updownarrow |
How to type β
- Copy & paste: press the Copy button above, then paste β anywhere β Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
21D5then press Alt+X. In any app, Win+. opens the symbol panel. - Mac: switch to the Unicode Hex Input keyboard, hold Option and type
21D5; or press Ctrl+Cmd+Space and search βup down double arrowβ. - Linux (GTK/IBus): press Ctrl+Shift+U, type
21d5, then Space. - HTML:
⇕renders as β. - LaTeX:
\Updownarrowin math mode (amssymb package for some symbols).
Frequently asked questions
How do I type β on Windows?
In Microsoft Word type 21D5 and press Alt+X. In any app press Win+. to open the symbol panel, or copy β from this page.
What is the HTML code for β?
Use ⇕ (hex) or ⇕ (decimal).
What is the LaTeX command for β?
Use \Updownarrow in math mode.