what is # in html code code example

Example 1: what is the code element in html

The HTML <code> element displays its contents styled in a fashion intended to indicate that the text is a short fragment of computer code. By default, the content text is displayed using the user agent's default monospace font

Example 2: what does html mean

HYPER-TEXT MARKUP LANGUAGE
It is one of the standardised markup languages that 
defines the layout of a webpage.

You can use CSS to aid in the styling of the webpage.