For循环练习题 

 1 package com.pingfan.struct;
 2 
 3 public class ForWhileDemo2 {
 4     public static void main(String[] args) {
 5         //练习1：计算0-100之间的奇数和偶数的和
 6 
 7         int oddSum = 0;
 8         int evenSum = 0;
 9 
10         for (int i = 0; i <= 100; i++) {
11             if(i%2!=0){//奇数
12                 oddSum+=i;//oddSum = oddSum + i;
13             }else{//偶数
14                 evenSum+=i;
15             }
16         }
17         System.out.println("奇数的和：" + oddSum);
18         System.out.println("偶数的和：" + evenSum);
19     }
 1 package com.pingfan.struct;
 2 
 3 public class ForDemo3 {
 4     public static void main(String[] args) {
 5         //练习2：用While或for循环输出1-1000之间能被5整除的数，并且每行输出3个
 6 
 7         for (int i = 1; i <= 1000; i++) {
 8             if(i%5==0){
 9                 System.out.print(i + "\t");
10             }
11             if (i%(5*3)==0){//每行
12                 System.out.println();
13                 //System.out.print("\n");
14             }
15         }
16         //println 输出完会换行
17         //print   输出完不会换行
18     }
19 }

 

posted @ 2021-03-22 23:22  HeartlessHero  阅读(93)  评论(0)    收藏  举报