The basic structure of HTML is
<HTML>
<HEAD>
...
</HEAD>
<BODY>
...
</BODY>
</HTML>
An HTML document should starts and ends with <html> and </html> tags.
Because these tags tell the browser that the entire document is composed in HTML.
Then inside these two tags, the document is split into two sections:
i) HEAD – It contains information about the document such as title, author of the document etc.
ii) BODY – It contains the content of the document which is displayed in the screen.
