Question 143885
I'll give you an example:

Let's consider all integers from 1 to any larger number.

So in notation this would mean:
1,2,3,...,n-2,n-1,n.

n would be the nth term.

So as an application, let's iterate all numbers from 1 to 100:

1,2,3,...,98,99,100.
100 would be the 100th term.