JavaScript is untyped language. This means that a JavaScript variable can hold a value of any data type. To declare variables in JavaScript, you need to use the var keyword. Whether it is a number or string, use the var keyword for declaration.
Here’s how you can declare numbers in JavaScript −
var points = 100; var rank = 5;
Example
You can try to run the following code to learn how to declare number in JavaScript −
<html>
<body>
<script>
<!--
var age = 20;
if( age > 18 ){
document.write("<b>Qualifies for driving</b>");
}
//-->
</script>
</body>
</html>