public class CountingLooping {
    public static void main(String[] args) {
        int option = 1;
        int[] coinArr = {1, 2, 3, 4, 5};
        int[] CoinQtyArr = {1, 2, 3, 4, 5};

        int totalCoin = 0;
        for (int i = 0; i < 5; i++) {
            if (option == 1) {
                totalCoin += (coinArr[i] * CoinQtyArr[i]);
            } else {
                //...
            }
        }
        System.out.println("the total coin are " + totalCoin);
    }
}