ThirdDigit

using System;

class ThirdDigit
{
    static void Main()
    {
        Console.Write("Enter your number: ");
        int number = int.Parse(Console.ReadLine());

        int restNumber = number / 100;
        int thirdDigit = restNumber % 10;

        bool isSeven = thirdDigit == 7;

        Console.WriteLine("Third digit of this number is 7 = " + isSeven);
    }
}