using System;

namespace constants
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 10;
            //The variable b is a constant and can't be changed after being assigned.
            const int b = 15;

            a = 5;
            //If we try this we will get an exception.
            //b = 10;

            Console.WriteLine("a: " + a + " b:" + b);
            Console.ReadLine();
        }
    }
}