DoWhile循环

 

 

 

package struct;

public class DoWhileDemo01 {
    public static void main(String[] args) {
        int i = 0;
        int sum = 0;
        do{
            sum = sum+i;
            i++;

        }while (i<=100);
        System.out.println(sum);//5050
        System.out.println(i);//101
    }
}

package struct;

public class DoWhileDemo02 {
    public static void main(String[] args) {
        int a = 0;
        while (a<0){
            System.out.println(a);
            a++;//循环的标志
        }
        System.out.println("================================================");
        do{
            System.out.println(a);
            a++;

        }while (a<0);
    }
}