How can I use a framework in my code?

Question

I have heard of frameworks as prewritten code to help ease coding but I don't know how to incorporate them into my code

Answer 1

Web development?

You use framework as your own css or javascript.
<script src="website_with_framework"></script>

You can use source the www adress or you can download the file and use it your directory.

Ps: enter framework web site and there will teach it and pass their adress.

Ps2: some frameworks are complex, as angular, so need really install, config node and so on...