The stated problem requires returning the smallest integer greater than 0 in the list. 0 will only be the running minimum if only non-positive numbers have been

The stated problem requires returning the smallest integer greater than 0 in the list. 0 will only be the running minimum if only non-positive numbers have been seen so far, and since i is greater than zero in the condition, if minimum == 0 it means i is the first positive integer we’ve seen, so even though i > minimum (i > 0) we need to swap i as the minimum at that point.