LaTeX Left Right Arrow (↔) - Complete Guide

The bidirectional arrow (↔) indicates equivalence or "if and only if" in logic.

Symbol Preview

↔

Left Right Arrow

LaTeX Code

Method 1: Using \leftrightarrow

No package required

Recommended

\leftrightarrow

Bidirectional arrow

Method 2: Using \iff

No package required

\iff

If and only if (shorter)

What is the LaTeX Left Right Arrow?

The bidirectional arrow (↔) is used in mathematics to denote "if and only if" relationships, showing that two statements are logically equivalent.

How to Use Left Right Arrow in LaTeX

Method 1: Using \leftrightarrow

✅No package required

Bidirectional arrow

Example: Using \leftrightarrow

latex

\documentclass{article}

\begin{document}

% Using the Left Right Arrow
Text with \leftrightarrow

\end{document}

Method 2: Using \iff

✅No package required

If and only if (shorter)

Example: Using \iff

latex

\documentclass{article}

\begin{document}

% Using the Left Right Arrow
Text with \iff

\end{document}

Common Use Cases

The Left Right Arrow symbol is commonly used in the following contexts:

Logical Equivalence

If and only if relationship.

Code

$P \leftrightarrow Q$

Output

P ↔ Q

Complete Examples

Equivalence

Logical equivalence

latex

\documentclass{article}
\begin{document}

Two conditions are equivalent:
$$x = 5 \leftrightarrow x^2 = 25 \text{ (for positive x)}$$

\end{document}

Frequently Asked Questions about Left Right Arrow (↔)

Which LaTeX code should I use for Left Right Arrow?

For the Left Right Arrow symbol (↔), we recommend using the method marked as "Recommended" above. However, the best method depends on your specific needs:

\leftrightarrow: Bidirectional arrow
\iff: If and only if (shorter)

Where can I use the Left Right Arrow symbol?

The Left Right Arrow symbol (↔) is typically used:

In mathematical equations (math mode)
In regular text (if supported)
In various LaTeX environments

Can I use the Left Right Arrow symbol in display mode?

Yes, the Left Right Arrow symbol (↔) works in display mode (between $$ $$). This allows you to render the symbol on its own line with better visibility.

🔗 Related Symbols You May Need

Right Arrow

Left Arrow

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