\LarrThe \Larr command in LaTeX is used to produce a leftwards arrow, which is often used to indicate direction or to denote mappings and transformations in mathematical expressions.
Indicating a transformation or mapping from B to A.
A \Larr BShowing that x is derived from or related to y.
x \Larr yRepresenting a backward direction or movement.
\text{Back} \Larr \text{Forward}