Which programming is used to make a simple website?

Answer 1

The absolute basics are just HTML and CSS but to make the website more functional we use Javascript and for a even better response PHP

Answer 2

For simple site but with great functions?

HTML5
CSS3
JavaScript with framework like angularJS or librairie like react.
Firebase for a powerfull and realtime database.

Look at JAMstack for more.

Answer 3

HTML (base)
CSS (design)
JavaScript (interactive)
JQuery (more JS)
PHP (server side)

EDIT

ECMAScript instead of JavaScript. All common web development languages are incredibly poorly designed, might as well knock out the worst one.