C#
using System;using System.Globalization;class NumberFormatInfoSample { public static void Main() { // Gets a NumberFormatInfo associated with the en-US culture. NumberFormatInfo nfi = new CultureInfo( "en-US", false ).NumberFormat; // Displays a value with the default separator (","). Int64 myInt = 123456789; Console.WriteLine( myInt.ToString( "N", nfi ) ); // Displays the same value with a blank as the separator. nfi.NumberGroupSeparator = " "; Console.WriteLine( myInt.ToString( "N", nfi ) ); }}/* This code produces the following output.123,456,789.00123 456 789.00*/