// 分别使用while、do-while和for语句编程，求1～100的和。
public class lianxi2 {
    public static void main(String agrs[]) {
        int sum = 0;
        int sum1 = 0;
        int sum2 = 0;
        int i=1;
        while(i<101){
            
            sum+=i;
            i++;
        }
        System.out.println(sum);
        System.out.println("+++++++++++++++++++++");
        
        do{
            
            sum1+=i;
            i++;
            
        }while(i<101);
        System.out.println(sum1);
        System.out.println("+++++++++++++++++++++");
        
        for(i=1;i<101;i++){
            sum2+=i;
        }
        System.out.println(sum2);
        System.out.println("+++++++++++++++++++++");
    }

}


为什么do while 循环算出来的101啊

哦 原来如此，谢谢了。