\to
The \to command in LaTeX is used to produce a right arrow, typically used to denote a function mapping, a limit process, or a logical implication.
Function mapping from set X to set Y
f: X \to Y
Limit of a function as x approaches 0
\lim_{x \to 0} \frac{\sin x}{x} = 1
Logical implication from A to B
A \to B