Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<style>
p
{
max-width:100px;
background-color:yellow;
}
</style>
</head>

<body>
<p>The maximum width of this paragraph is set to 100px.</p>
</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.