Coalescing operator?? in C#

If the left-hand operand is not null, the null-coalescing operator?? returns its value; otherwise, it evaluates the right-hand operand and returns its result. If the left-hand operand evaluates to non-null, the?? operator does not evaluate the right-hand operand.

The null-coalescing assignment operator??=, which is available in C# 8.0 and later, assigns the value of its right-hand operand to its left-hand operand only if the left-hand operand evaluates to null. If the left-hand operand evaluates to non-null, the??= operator does not evaluate the right-hand operand.

namespace NullCoalescing
{
class Program
{
static int Main(string[] args)
{
        int? ticketAvailable = 100;    

        int TotalTicket;

        if (ticketAvailable == null)
        {
            TotalTicket = 0;
        }
        else
        {
            TotalTicket = ticketAvailable.Value;
        }


        Console.WriteLine(TotalTicket);



        //Example of null Coalescing operator

        TotalTicket = ticketAvailable ?? 200;

        Console.WriteLine(TotalTicket);

        return 0;
    }
}
}