C#小Tip:數字格式化顯示

using System;
class Program
{

    static void Main()
    {
        decimal theDecNumber = 12345.678m; //the "m" creates a literal of type decimal from a double
        //Using the ToString Method
        //the number in the format string is the precision specifIEr
        Console.WriteLine("No formatting: " + theDecNumber.ToString());
        Console.WriteLine("Currency formatting: " + theDecNumber.ToString("C"));
        Console.WriteLine("Exponential formatting: " + theDecNumber.ToString("E"));
        Console.WriteLine("Fixed-point formatting: " + theDecNumber.ToString("F2"));
        Console.WriteLine("General formatting: " + theDecNumber.ToString("G"));
        Console.WriteLine("Number formatting to 2 decimal places: " + theDecNumber.ToString("N2"));
        Console.WriteLine("Number formatting to 3 decimal places: " + theDecNumber.ToString("N3"));
        Console.WriteLine("Number formatting to 4 decimal places: " + theDecNumber.ToString("N4"));
        Console.WriteLine("Percent formatting: " + theDecNumber.ToString("P0"));

        int theIntNumber = 123456;
        Console.WriteLine("Hexidecimal formatting (for integers): {0} = {1}", theIntNumber, theIntNumber.ToString("X"));

        double theDblNumber = 1234567890;
        Console.WriteLine("Custom formatting: {0} to US telephone {1}", theDblNumber, theDblNumber.ToString("(###) ### - ####"));

        //Keep console open if not run through command prompt
        Console.Write("\nPress Enter to Continue");
        Console.ReadLine();
    }
}