What is the output of this code?

Question

ArrayList<Integer> list = new ArrayList<Integer>();
for (int i = 0; i < 6; i++) {
list.add(i);
}
int x = 0;
Iterator<Integer> it = list.iterator();
while (it.hasNext()) {
x+= it.next();
}
System.out.println(x);

Answer 1

It's the sum of numbers from 0 to 5 = 15

Answer 2

Code Playground has the answer.

Answer 3

15

Answer 4

15

Answer 5

15

Answer 6

15