<html>
<head>
<title>This is my first webpage.</title>
</head>
<body>
<p>Hello world!</p>
<p><i>Hello world! (i)</i></p>
<p><em>Hello world! (em)</em></p><!-- em is preferred over i for italics-->
<p><b>Hello world! (b)</b></p>
<hr/>
<p><strong>Hello world! (strong)</strong></p><!-- strong is preferred over b for bold-->
<p><strong><em>Hello world! (em and strong)</strong></em></p><!--this is wrong -->
<p><strong><em>Hello world! (em and strong)</em></strong></p><!--this is correct -->
<hr/>
<h1>this is an h1</h1>
<h2>this is an h2</h2>
<h3>this is an h3</h3>
<h4>this is an h4</h4>
<h5>this is an h5</h5>
<h6>this is an h6</h6>
</body>
</html>