Java 循环输出下列数字： 1 3 6 10 15 2 5 9 14 4 8 13 7 12 11

int[] arr = {1,3,6,10,15,2,5,9,14,4,8,13,7,12,11};int i = 0; //使用while遍历while(i < arr。length){if(i != arr。length - 1){System。out。print(arr[i]+",");}else{System。out。print(arr[i]);}++i;}for(int j = 0; j < arr。length; j++){if(j != arr。length - 1){System。out。print(arr[j]+",");}else{System。out。print(arr[j]);}}