Why does the title not show on the output

Answer 1

Code playground output doesn't show it like other browsers do.

Answer 2

I guess you're talking about the content enclosed by the html <title></title> tags.

Well, by convention all the valid tags declared in between the opening and closing head tags do output anything on a browser's window.

However, content of the title tag acts as the title of the html document which displays on the browser's tab.