C#l练习（用方法来实现：分别计算1-100之间的所有整数的和和奇数的和)

   代码实现：1-100所有整数的和

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication7
{
    class Fa
    {
        public static int Sum()
        {
            int i;
            int sum = 0;
            for (i = 1; i <= 100; i++)
                sum += i;
            return sum;
        }

    }
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("1-100的整数总和为 {0}", Fa.Sum());  
            Console.ReadKey();


        }
    }
}

　　实现结果:

     

 代码实现：1-100所有奇数的和

 public static int Sum()
        {
            int i;
            int sum = 0;
            for (i = 1; i <= 100; i++)
                if(i%2!=0)
                sum += i;
            return sum;
        }

　　主体同上