c# 开根号 牛顿迭代

double n = 1,m;
               Console.WriteLine("请输入您要开根号的数：");
               m = Convert.ToDouble(Console.ReadLine());
               for (int i = 0; 1==1; i++)
               {
                   n = (n + m / n) /2;
                
                   if (i==10000)
                   {
                       break; 
                   }
               }
               Console.WriteLine(n);