To initialize them to some number to prevent comparisons between a number and NaN. Typically we use zero for that, but that would mess up the comparisons. So this uses the highest possible int so comparisons will still work ok.

If the input array is reverse sorted, I think this solution would fail.
If the input array were { 1000, 999, 998, 997 }, only lowone would ever be assigned.

(Unless I'm missing something?)

Is there a benefit to doing this?

Oh nevermind - because you get overflow when trying to add two really big ints together...just got it :)

Why doesn't this work if you make the longone and longtwo variables ints instead of long?

According to problem text, cannot happen

negative numbers as input?

array1->[2 2 9]
array2->[4 9 9]