Variables allow us to express many common rules and relations in
All of these
Variables are those numbers which do not have a fixed value and can be treated with all operations of numbers like addition, subtraction, multiplication and division. For example, the commutative property of numbers a + b = b + a, where a & b can take any values like 1, -2, 23 etc. Many practical situations or real life scenarios can we well related and expressed using variables. We can also check the definite value for which the variable satisfies an equation.