Ending a script

I was asking myself, what are the ways of ending a script?

Is there a comand for endiing in the middle an if-clause so the rest of the else if's are ignored?
Or just ending a whole script (,named script A, for example) and returning to the script that called script A and continue to execute some commands?

I found

in the dictionary. But it dosen't say anything about if-clauses.

1. I think you can use exit script to break out of any script completely. You can also use 'exit returning' to return a value when you break out.

2. Break works on for loops and while loops. It doesn't do anything related to if clauses. However, this shouldn't be a problem because

3. If an if clause is run, all the else if clauses that come afterwards gets skipped, even if the else if condition becomes true after the if clause. It'd be something like this:

Thanks a lot!

That's really helpful to kown.