What does a "scrolling range" means?

Question

I am currently learning about scrollbars, and I encountered the term "scrolling range", but I am not sure what it means exactly, I think it means one of the following two definitions:

Say I have a scrollbar with a min position of 0, and a max position of 99.

1) The scrolling range is 100.

2) The scrolling range is 0 to 99.

Which one of these two definitions is correct?

Answer 1

You have 100 possible values in range from (including) 0 to 99.