Variables

As discussed above, variables can store and manipulate data. Data values can be assigned to a variable by using the assignment operator which is the equal sign (=). Once a value is assigned to the variable, it corresponds to that value unless it is reassigned. Suppose we assign a value 5 to a variable a. This concept can be visualized as below.

This ensures that whenever we use the variable a in our program, we will get a value of 5. Let's understand this with code examples in JavaScript.