Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
div {
    font-size: 30px;
    border: 1px solid black;
}

span {
    font-size: 1ex;
}
</style>
</head>
<body>

<div>The font-size of the div element is set to 20px. <span>The span element inside the div element has a font-size of 1ex</span>.</div>

</body>
</html>