LongLeftRightArrow
\[LongLeftRightArrow]
Alias: <-->. Infix arrow operator. x y is by default interpreted as LongLeftRightArrow[x, y]. See The Mathematica Book: Section 3.10.4. See also: \[LeftRightArrow] , \[DoubleLongLeftRightArrow] , \[LeftArrowRightArrow] , \[Equilibrium] .