VB.NET Core Classes in a Nutshell

Appendix B. Format Specifiers

Table B-1 lists the numeric format specifiers supported by the String.Format method on the predefined numeric types.

Table B-1. Numeric format specifiers

Specifier	String result	Datatype
C[ n ]	$XX, XX.XX ($XX, XXX.XX)	Currency
D[ n ]	[-]XXXXXXX	Decimal
E[ n ] or e[ n ]	[-]X.XXXXXXE+xxx [-]X.XXXXXXe+xxx [-]X.XXXXXXE-xxx [-]X.XXXXXXe-xxx	Exponent
F[ n ]	[-]XXXXXXX.XX	Fixed point
G[ n ]	General or scientific	General
N[ n ]	[-]XX, XXX.XX	Number
X[ n ] or x[ n ]	Hex representation	Hex

This example uses numeric format specifiers without precision specifiers:

Imports System
      Public Class TestDefaultFormats
         Public Shared Sub Main()
            Dim i As Integer = 654321
            Console.WriteLine("{0:C}", i)     ' $654,321.00
            Console.WriteLine("{0:D}", i)     ' 654321
            Console.WriteLine("{0:E}", i)     ' 6.543210E+005
            Console.WriteLine("{0:F}", i)     ' 654321.00
            Console.WriteLine("{0:G}", i)     ' 654321
            Console.WriteLine("{0:N}", i)     ' 654,321.00
            Console.WriteLine("{0:X}", i)     ' 9FBF1
            Console.WriteLine("{0:x}", i)     ' 9fbf1
         End Sub
      End Class

This example uses numeric format specifiers with precision specifiers on a variety of int values:

Imports System Public Class TestIntegerFormats Public Shared Sub Main() Dim i As Integer = 123 Console.WriteLine("{0:C6}", i) '$123.000000 Console.WriteLine("{0:D6}", i) '000123 Console.WriteLine("{0:E6}", i) '1.230000E+002 Console.WriteLine("{0:G6}", i) '123 Console.WriteLine("{0:N6}", i) '123.000000 Console.WriteLine("{0:X6}", ...