C#上手练习2（FOR语句）

using System;
using System.Collections.Generic;
using System.Text;

namespace Kingtest02
{
    class Fortest
    {
        static void Main(String[] args)
        {
            Fortest Fortest = new Fortest();
            Fortest.Sum();
            Fortest.Factorial();
        }

        public void Sum()//计算1到10的和
        {
            int a = 0;
            for (int i = 1; i < 11; i++)
            {
                if (i == 10)
                {
                    Console.Write(i + "=");
                    a = a + i;
                }
                else
                {
                    Console.Write(i + "+");
                    a = a + i;
                }
            }
            Console.WriteLine(a);
        }
        public void Factorial()//99乘法口诀
        {
            for (int i = 1; i < 10; i++)
            {
                for (int j = 1; j <= i; j++)
                {
                    Console.Write(j + "*" + i + "=" + j * i + "\t");//\t是转义字符（制表符），如果不使用转义字符\t，则结果显示比较乱
                }
                Console.WriteLine();
            }
        }
    }
}