| Property | Value |
|---|---|
| Codepoint | U+21D4 |
| Literal Character | ⇔ |
| Name | LEFT RIGHT DOUBLE ARROW |
| Sketch | ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ |
| Control Character | no |
| Block | Arrows |
| Subblock | Punctuation |
| UTF-8 byte encoding | e2 87 94 |
| UTF-16 byte encoding | 21 d4 (big endian) |
| HTML Entity | ⇔ |
| LaTeX expression | $\Leftrightarrow$ |
| Perl string literal | \x{21D4} |