JavaScript : Object-Oriented Programming

Operators

Operators take one or two values (or variables), perform an operation, and return a value. Let's check out a simple example of using an operator, just to clarify the terminology:

> 1 + 2;
3

In this code:

• + is the operator
• The operation is addition
• The input values are 1 and 2 (the input values are also called operands)
• The result value is 3
• The whole thing is called an expression

Instead of using the values 1 and 2 directly in the expression, you can use variables. You can also use a variable to store the result of the operation, as the following example demonstrates:

> var a = 1;
> var b = 2;
> a + 1;
2
> b + 2;
4
> a + b;
3
> var c = a + b;
> c;
3

The following table lists the basic arithmetic operators:

Operator symbol	Operation	Example ...