# \Longleftrightarrow

The ⟺ symbol (Long left right double arrow, U+27FA), written as \Longleftrightarrow in LaTeX math mode.

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

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Arrows](https://texform.dev/latex/topics/arrows) |
| Packages | base |
| Allowed mode | math |
| Glyph | ⟺ |
| Unicode | U+27FA LONG LEFT RIGHT DOUBLE ARROW |
| Delimiter | No |

## Syntax

```latex
\Longleftrightarrow
```

Takes no arguments.

## Usage frequency

0.07% of formulas in the measured corpus contain this entry, rank 149 of 474 entries with frequency data.

## In TeXForm

TeXForm parses this entry as a character leaf mapped to U+27FA (LONG LEFT RIGHT DOUBLE ARROW).