Hi! I just don’t get what is an accumulator and how do I get it. For example, here is a screenshot from exercise:

Can someone explain me a bit more, what exactly is `accumulator`

? I think it’s just language barrier messing up here with me so I don’t get it right away.

After looking a bit more in a example I see, that, if we sum first iteration’s `accumulator + currentValue`

we get second iteration’s` accumulator`

. The same with next iteration’s `accumulator`

. But it still doesn’t make any sense for me. Why value 3 wasn’t used in example as value of `currentValue`

? And why it didn’t start from the `currentValue 1`

?