1 package cn.happy;
 2 
 3 public class Day03 {
 4   public static void main(String[] args) {
 5      //Ctrl+F:快速查找和替换
 6       int[] nums={8,4,2,1,23,344,12};
 7       //1.只管打印
 8       for (int i = 0; i < nums.length; i++) {
 9           System.out.println(nums[i]);
10       }
11       System.out.println("===============我是高贵的分割线=======");
12       int sum=0;
13       for (int i = 0; i < nums.length; i++) {
14           sum+=nums[i];
15       }
16       System.out.println("和是"+sum);
17       //2.只管求和
18       System.out.println("===============我是高贵的分割线=======");
19       //3.只管数字对比
20       int num=3440;
21       boolean flag=false;//默认该值在数组中不存在
22       for (int i = 0; i < nums.length; i++) {
23          if(num==nums[i]){
24             //if code execute here,如果代码执行到这里，证明存在
25              System.out.println("亲，存在！");
26              flag=true;
27              break;
28          }
29       }
30       if (flag==false) {
31         System.out.println("不存在");
32       }
33   } 
34 }