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