Console.WriteLine("Please enter amount of numbers :");
int n = int.Parse(Console.ReadLine());
int[] numbers = new int[n];
Console.WriteLine("enter " + n + " numbers :");
for (int i = 0; i < n; i++)
int input = int.Parse(Console.ReadLine());
while (index < n && flag)
if (num % 7 == 0 && num != 0)
Console.WriteLine("not found.");
Console.WriteLine(index + " " + numbers[index]);