# If and Only If Symbol (⟺)

The if and only if symbol is used as a logical statement in math. Typically the symbol is used in an expression like:

In plain language, this means that if is true, then must be true and if is false, then must be false.

Symbol Format Data
Unicode
10234
TeX
\iff
SVG

## Usage

The logical if and only if operator, or iff for short, returns ture