I See Sharp: A few basic things

Decimal Places
[Beginner]

There are quite a few things to know before really getting the hang of C#, and I believe that learning about how to format numbers that need to be output is something pretty basic, that many programmers disregard. However, here's a basic tutorial about controlling the number of decimal places that a decimal type displays.

Let's move on directly to the code. It's simple. Nothing complicated to understand. Check it out:


using System;
using System.Globalization;

namespace NumberFormat
{
   /// <summary>
   /// MultiParam App
   /// </summary>
   class Class1
   {
       /// <summary>
       /// The main entry point for the application.
       /// </summary>
       [STAThread]
       static void Main(string[] args)
       {
           NumberFormatInfo myFormat = new NumberFormatInfo();
                   double d = 15.6781005479;

           for (int i=0; i<=10; i++)
           {
               myFormat.NumberDecimalDigits = i;
               Console.WriteLine(i.ToString() +
                   " decimal digit(s): \t\t"+d.ToString("N", myFormat));
           }

           Console.ReadLine();
       }
   }
}

Notice that I've included System.Globalization in the usings. This is a namespace that is required in order to use the NumberFormatInfo class.

What I did was basically to instantiate a NumberFormatInfo class, and play with the NumberDecimalDigits property (which I kept incrementing). Watch the results on a console :) Also, note the use of the overloaded ToString() method, in which I passed two parameters, namely a string ("N"), and the NumberFormatInfo class that I instantiated.

Hope this little code snippet helps!

# posted by Rowy @ Thursday, July 21, 2005

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Thursday, July 21, 2005

A few basic things