Github License and Code Protection

Question

Assume I want to post a project of mine to github.

I want people to be able to see it, clone it, and maybe even contribute and make changes that I'll check and apply if they are good.

BUT, I obviously don't want people to copy my code and post it as it's theirs... or even just copy certain parts of it.

What license should I pick? And how can I make sure that people don't copy my code? Are the licenses free?

Answer 1

Take a look at creative commons licenses. This page can help you find the right one for your purposes:
https://chooser-beta.creativecommons.org/