GetFourDigitsOfNumber - FunctionsWithThem

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FourDigitNumber
{
    class FourDigitNum
    {
        static void Main()
        {
            int num;
            Console.WriteLine("Enter a four-digit number: ");
            num = int.Parse(Console.ReadLine());

            int firstDigit = num % 10;
            int secondDigit = num / 10 % 10;
            int thirdDigit = num / 100 % 10;
            int fourthDigit = num / 1000 % 10;

            int sumDigits = firstDigit + secondDigit + thirdDigit + fourthDigit;
            Console.WriteLine("The sum of the digits is: " + sumDigits);

            Console.WriteLine("The number in reversed order is: " + firstDigit + secondDigit + thirdDigit + fourthDigit);

            Console.WriteLine("When the last digit is on first position: " + firstDigit + thirdDigit + secondDigit + fourthDigit);

            Console.WriteLine("When exchanging the second and third digits: " + fourthDigit + secondDigit + thirdDigit + firstDigit);
        }
    }
}