Console.WriteLine("請輸入起點整數(shù)");
int numberOne = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("請輸入終點整數(shù)");
int numberTwo = Convert.ToInt32(Console.ReadLine());
int i = numberOne;
int sum = 1;
while (numberOne < numberTwo)
{
sum = sum + numberOne;
numberOne++;
}
Console.WriteLine("從{0}到{1}之和為{2}", i, numberTwo, sum);
int i=1;
int sum = 0;
do
{
sum = sum + i;
i++;
}while(i