JavaScript Variables

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JavaScript variables are basically the containers for storing the data values in a JavaScript program.

Declare Variables in JavaScript

To declare variables in JavaScript, use var keyword. Here is an example shows how to declare variables in JavaScript:

var employee;
var name;

You can also declared multiple variables at the same line (with only one var keyword) as shown in this example:

var num1, num2, num3;

JavaScript Variables Example

Here is an example uses three variables namely a, b, and c:

<!DOCTYPE html>
   <title>JavaScript Variables Example</title>

<p id="variable_para1">i will be replaced</p>
   var num1 = 500;
   var num2 = 600;
   var res = num1 + num2;
   document.getElementById("variable_para1").innerHTML = res;


Here is the output of the above JavaScript program:

javascript variables

JavaScript Online Test

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