DoWhile结构

package com.struct;

public class DoWhile01 {
    public static void main(String[] args) {
        ////计算 1+2+3+...+100=？

        int i = 0;
        int sum = 0;

        do{
            sum = sum + i;
            i++;
        }while (i<=100);
        System.out.println(sum);
    }
}

package com.struct;

public class DoWhile02 {
    public static void main(String[] args) {
        int a = 0;
        while (a<0){
            System.out.println(a);
            a++;
        }
        System.out.println("=============================");
        do{
            System.out.println(a);
            a++;
        }while (a<0);
    }
}