public class Sample17 {
    public static void main(String[] args) {
        String[] cars = {"xpeng", "li", "nio"};
        int[] myNum = {1,2,3,4};

        System.out.println(cars[0]);
        System.out.println(myNum[1]);

        cars[0] = "xpengniubi";
        System.out.println(cars[0]);

        System.out.println(myNum.length);

        for(String i : cars) {
            System.out.println(i);
        }

        int[][] myNums= { {1,2,3,4}, {5,6,7} };
        int x = myNums[1][1];
        System.out.println(x);

        for(int i =0; i<myNums.length; i++) {
            for(int j=0; j<myNums[i].length; j++) {
                System.out.println(myNums[i][j]);
            }
        }
    }
}