# 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

Logical if and Only If | Operator

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