How does interpreter works...?

Quote:

i don't have any idea about it.

Looking at your other questions, that seems to be your standard request. I would suggest you get hold of a book on basic computing, which should answer some of them. You can follow that with books on the specific languages and frameworks that you are interested in.

Instead of posting questions every time you don't understand something and hoping people will explain in the detail you want, start using Google to at least do some research for yourself.
I copied a bit of your question and pasted it into Google, and got over 57,000,000 hits - all of which look very relevant on the first page: how does interpreter work - Google Search[^]
Starting with Google means you get at least the basics much more quickly, as well as looking less of an idiot when someone looks at your question history ... and it means you don't waste the time of people who will just send you to the links Google would have found in the first place.
Give it a try: it's called "research" and it should be a valuable tool in the hands of every human being.