C# Language Pocket Reference

Format Specifiers

Table 1-17 lists the numericformat specifiers supported by the Format method on the predefined numeric types.

Table 1-17. 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 a variety of numeric format specifiers:

using System; class TestDefaultFormats { static void Main( ) { // no precision specifiers int i = 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 // use precision specifiers i = 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}", i); // 00007B // use a double value double d = 1.23; Console.WriteLine("{0:C6}", d); // $1.230000 Console.WriteLine("{0:E6}", d); // 1.230000E+000 Console.WriteLine("{0:G6}", ...