Quiz help

Question

Can someone help me understand this problem. The solution was 5 and I just want a better understanding of how.
x=0
for i in 2...4
x+=i
end
puts x

Answer 1

In this cycle, the range is set from 2 to 4, (4 is not inclusive), that is:
1. x = x + i => x = 0 + 2
2. x = 2 + 3

Answer 2

Ranges have inclusive and exclusive syntax

.. includes the last number while ... does not hence 4 is not included in the loop.

Answer 3

How did you get 4=x. Is it always going to be assumed to be the max?