while循环

package com.zhao.struct;

public class WhileDemo01 {
    public static void main(String[] args) {
        //输出1-100
        int i = 0;

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

==============================================

package com.zhao.struct;

public class WhileDemo02 {
    public static void main(String[] args) {
        //死循环
        while (true){
            //等待客户端连接
            //定时检查
            //。。。。。
        }
    }
}

================================================

package com.zhao.struct;

public class WhileDemo03 {
    public static void main(String[] args) {
        //计算1+2+3...100=?

        int i = 0;
        int sum = 0;

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