入门学习补习2

            //for (初始条件; 满足条件; 状态改变)
           // {
            //循环体；
            //}
            //int sum = 0;
            //for (int i = 1; i <= 3; i++)
            //{
            //    sum += i;
            //}
            //Console.WriteLine(sum);
            //Console.ReadLine();

            //for (int i = 1; i <= 3; i++)
            //{
            //    for (int=j;j<=4,j++)
            //{
            //Console.WriteLine("您好！");
            //}
            //Console.WriteLine(sum);
            //Console.ReadLine();

  输入一个数求阶乘和

            //Console.Write("请输入一个数：");
            //int n = int.Parse(Console.ReadLine());
            //int sum = 0;
            //for (int a = 1; a <= n; a++)
            //{
            //    int x = 1;     //int x=1在里面，每次循环可以重新定义x
            //    for (int b = 1; b <= a; b++)
            //    {
            //        x *= b;
            //    }
            //    sum += x;
            //}
            //Console.WriteLine(sum);
            //Console.ReadLine();

入门学习补习2

原文：http://www.cnblogs.com/zhangmeng1988/p/4951209.html