java循环练习题-计算100以内偶数之和

1：for 循环：

package cn.work;

public class Work1 {
    
    
    public static void main(String[] args) {
    
    
        int n = 0;
        for (int i = 0; i <=100 ; i++) {
    
    
            if (i%2==0){
    
    
                n = n + i;
            }
        }
        System.out.println("100以内的偶数和为"+n);
    }
}

2：while 循环

package cn.work;

public class Work2 {
    
    
    public static void main(String[] args) {
    
    
        int i = 0;
        int n = 0;
        while(i<=100){
    
    
            i++;
            if(i%2==0){
    
    
                n = n+i;
            }
        }
        System.out.println("100以内的偶数和为"+n);
    }
}

3：do…while 循环

package cn.work;

public class Work2 {
    
    
    public static void main(String[] args) {
    
    
        int i = 0;
        int n = 0;
        while(i<=100){
    
    
            i++;
            if(i%2==0){
    
    
                n = n+i;
            }
        }
        System.out.println("100以内的偶数和为"+n);
    }
}

运算结果为