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AP Computer Science A Quiz

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Refer to the code below. Which part of the loop increments the loop counter?

public class EvenSumStepTwo {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4};
        int evenSum = 0;

        // Loop increments by 2 each iteration
        for (int index = 0; index < numbers.length; index += 2) {
            if (numbers[index] % 2 == 0) {
                evenSum += numbers[index];
            }
        }

        System.out.println("Even sum: " + evenSum);
    }
}

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