U+27FA "⟺" Long Left Right Double Arrow Unicode Character

U+27FA "⟺" Long Left Right Double Arrow is a mathematical and logical symbol that represents a bidirectional equivalence or biconditional relationship between two statements, meaning that each implies the other and they are logically or operationally identical. It is distinct from a single line arrow because its double stroke emphasizes a two way or reversible connection, often used in formal logic, set theory, and mathematics to denote that two propositions are mutually dependent or equivalent. This character can also appear in technical diagrams and computer science contexts to indicate a two way mapping or correspondence between elements.