while 测试

package com.zxs.process;

public class whileces {
    public static void main(String[] args) {
        int a=0;
        int s=0;
        //do...while  先执行，后判断
        while (a<=50){
            s=s+a;
            a++;
        }
        System.out.println(s);
    }
}