language code html code example

Example 1: is html a programming language

HTML is a markup language. We don't say HTML as a programming language.

Example 2: html lang tab

It basically tells the search engine about the language of the content of the web page.

Example 3: is html a programming language

Since HTML5, HTML is considered a programming language. 
This is because it has the possibility of interacting with the user, so although it is a markup language,
it has scripting so it is tecnically a programming language.