public static void Main()
int num, first, next, last, total;
Console.WriteLine("Hi! How many numbers do you want to add??");
num = int.Parse(Console.ReadLine());
Console.WriteLine("Write the first number:");
first = int.Parse(Console.ReadLine());
for(int i = 1; i <= num - 2; i++)
Console.WriteLine("Write the next number:");
next = int.Parse(Console.ReadLine());
Console.WriteLine("Write the last number:");
last = int.Parse(Console.ReadLine());
Console.WriteLine("The total addition of the numbers is: " + total);