\leqThe symbol \leq is used to denote 'less than or equal to' in mathematical expressions. It is a binary relation that indicates one quantity is either less than or exactly equal to another quantity.
x is less than or equal to y.
x \leq yThe sum of squares of a and b is less than or equal to the square of c.
a^2 + b^2 \leq c^2The variable n is less than or equal to 10.
n \leq 10