\leftrightarrowThe \leftrightarrow symbol is used to denote a bidirectional relationship or equivalence between two expressions. It is commonly used in logic, mathematics, and computer science to represent logical equivalence, mutual implication, or a two-way relationship.
Logical equivalence between statements A and B
A \leftrightarrow BBidirectional relationship between variables x and y
x \leftrightarrow yEquivalence of predicates P and Q for variable x
P(x) \leftrightarrow Q(x)