# \Leftrightarrow

The ⇔ symbol (Left right double arrow, U+21D4), written as \Leftrightarrow in LaTeX math mode.

https://texform.dev/latex/symbols/Leftrightarrow

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Arrows](https://texform.dev/latex/topics/arrows) |
| Packages | base |
| Allowed mode | math |
| Glyph | ⇔ |
| Unicode | U+21D4 LEFT RIGHT DOUBLE ARROW |
| Delimiter | No |

## Syntax

```latex
\Leftrightarrow
```

Takes no arguments.

## Usage frequency

0.14% of formulas in the measured corpus contain this entry, rank 125 of 474 entries with frequency data.

## In TeXForm

TeXForm parses this entry as a character leaf mapped to U+21D4 (LEFT RIGHT DOUBLE ARROW).