FunctionNumberInOrder

using System;

namespace ConsoleApp25
{
    class Program
    {
        public static string SortedNumber(int num)
        {
            int minimum = num % 10;
            num /= 10;
            while (num > 0)
            {
                if (num % 10 < minimum)
                {
                    minimum = num % 10;
                    num /= 10;
                }
                else
                {
                    return "False";
                }
            }
            return "True";
        }

        static void Main(string[] args)
        {
            string result;
            int num;

            Console.WriteLine("Number: ");
            num = int.Parse(Console.ReadLine());

            result = SortedNumber(num);
            Console.WriteLine(result);
        }
    }
}