00025_二维数组的元素遍历及数组的元素累加和

1、二维数组的元素遍历及数组的元素累加和

 1 class ArrayDemo09 {
 2     public static void main(String[] args){
 3         //一维数组的求累加和并遍历
 4         int[] arr = {10,20,30,40,50};
 5         int sum = 0; 
 6         for (int i=0; i<arr.length; i++) {
 7               //System.out.println(arr[i]);
 8             sum += arr[i];
 9         }
10         System.out.println("sum= " + sum);
11         System.out.println("---------------------");
12         
13 //二维数组的求累加和并遍历
14         int[][] arr2 = { {1,2},{3,4,5},{6,7,8,9,10} };
15         int sum2 = 0;
16         for (int i=0; i<arr2.length; i++) {
17             for (int j=0; j<arr2[i].length; j++) {
18                  //System.out.println(arr2[i][j])
19                 sum2 += arr2[i][j];
20             }
21         }
22         System.out.println("sum2= "+ sum2);
23     }
24 }

 

posted @ 2017-12-21 01:36  gzdlh  阅读(436)  评论(0)  编辑  收藏  举报