Bootstrap Hidden Classes

Use of .hidden-xs, .hidden-sm, .hidden-md and .hidden-lg classes is shown for responsive design.
Note:change the size of browser and try to analyse the use of classes.

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Bootstrap Grid Example</title>
    <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
    <div>
        <div class="hidden-sm hidden-xs hidden-md well">visible only on large screens.</div>
    </div>
    <div>
        <div class="hidden-lg hidden-sm hidden-xs well">visible only on medium screens.</div>
    </div>
    <div>
        <div class="hidden-md hidden-lg hidden-xs well">visible only on small screens.</div>
    </div>
    <div>
        <div class="hidden-md hidden-lg hidden-sm well">visible only on extrasmall screens.</div>
    </div>
</body>
</html>

Output