The following example demonstrates the standard formatting specifiers for numbers, dates, and enumerations.
// This code example demonstrates the Console.WriteLine() method. // Formatting for this example uses the "en-US" culture. using System; class Sample { enum Color {Yellow = 1, Blue, Green}; static DateTime thisDate = DateTime.Now; public static void Main() { Console.Clear(); // Format a negative integer or floating-point number in various ways. Console.WriteLine("Standard Numeric Format Specifiers"); Console.WriteLine( "(C) Currency: . . . . . . . . {0:C}\n" + "(D) Decimal:. . . . . . . . . {0:D}\n" + "(E) Scientific: . . . . . . . {1:E}\n" + "(F) Fixed point:. . . . . . . {1:F}\n" + "(G) General:. . . . . . . . . {0:G}\n" + " (default):. . . . . . . . {0} (default = 'G')\n" + "(N) Number: . . . . . . . . . {0:N}\n" + "(P) Percent:. . . . . . . . . {1:P}\n" + "(R) Round-trip: . . . . . . . {1:R}\n" + "(X) Hexadecimal:. . . . . . . {0:X}\n", -123, -123.45f); // Format the current date in various ways. Console.WriteLine("Standard DateTime Format Specifiers"); Console.WriteLine( "(d) Short date: . . . . . . . {0:d}\n" + "(D) Long date:. . . . . . . . {0:D}\n" + "(t) Short time: . . . . . . . {0:t}\n" + "(T) Long time:. . . . . . . . {0:T}\n" + "(f) Full date/short time: . . {0:f}\n" + "(F) Full date/long time:. . . {0:F}\n" + "(g) General date/short time:. {0:g}\n" + "(G) General date/long time: . {0:G}\n" + " (default):. . . . . . . . {0} (default = 'G')\n" + "(M) Month:. . . . . . . . . . {0:M}\n" + "(R) RFC1123:. . . . . . . . . {0:R}\n" + "(s) Sortable: . . . . . . . . {0:s}\n" + "(u) Universal sortable: . . . {0:u} (invariant)\n" + "(U) Universal full date/time: {0:U}\n" + "(Y) Year: . . . . . . . . . . {0:Y}\n", thisDate); // Format a Color enumeration value in various ways. Console.WriteLine("Standard Enumeration Format Specifiers"); Console.WriteLine( "(G) General:. . . . . . . . . {0:G}\n" + " (default):. . . . . . . . {0} (default = 'G')\n" + "(F) Flags:. . . . . . . . . . {0:F} (flags or integer)\n" + "(D) Decimal number: . . . . . {0:D}\n" + "(X) Hexadecimal:. . . . . . . {0:X}\n", Color.Green); } } /* This code example produces the following results: Standard Numeric Format Specifiers (C) Currency: . . . . . . . . ($123.00) (D) Decimal:. . . . . . . . . -123 (E) Scientific: . . . . . . . -1.234500E+002 (F) Fixed point:. . . . . . . -123.45 (G) General:. . . . . . . . . -123 (default):. . . . . . . . -123 (default = 'G') (N) Number: . . . . . . . . . -123.00 (P) Percent:. . . . . . . . . -12,345.00 % (R) Round-trip: . . . . . . . -123.45 (X) Hexadecimal:. . . . . . . FFFFFF85 Standard DateTime Format Specifiers (d) Short date: . . . . . . . 6/26/2004 (D) Long date:. . . . . . . . Saturday, June 26, 2004 (t) Short time: . . . . . . . 8:11 PM (T) Long time:. . . . . . . . 8:11:04 PM (f) Full date/short time: . . Saturday, June 26, 2004 8:11 PM (F) Full date/long time:. . . Saturday, June 26, 2004 8:11:04 PM (g) General date/short time:. 6/26/2004 8:11 PM (G) General date/long time: . 6/26/2004 8:11:04 PM (default):. . . . . . . . 6/26/2004 8:11:04 PM (default = 'G') (M) Month:. . . . . . . . . . June 26 (R) RFC1123:. . . . . . . . . Sat, 26 Jun 2004 20:11:04 GMT (s) Sortable: . . . . . . . . 2004-06-26T20:11:04 (u) Universal sortable: . . . 2004-06-26 20:11:04Z (invariant) (U) Universal full date/time: Sunday, June 27, 2004 3:11:04 AM (Y) Year: . . . . . . . . . . June, 2004 Standard Enumeration Format Specifiers (G) General:. . . . . . . . . Green (default):. . . . . . . . Green (default = 'G') (F) Flags:. . . . . . . . . . Green (flags or integer) (D) Decimal number: . . . . . 3 (X) Hexadecimal:. . . . . . . 00000003 */
The example changes the line terminator from its default value of "\r\n" or
vbCrLf to "\r\n\r\n" or vbCrLf + vbCrLf. It then calls the WriteLine() and WriteLine(String) methods to display output to the console.using System; public class Example { public static void Main() { string[] lines = { "This is the first line.", "This is the second line." }; // Output the lines using the default newline sequence. Console.WriteLine("With the default new line characters:"); Console.WriteLine(); foreach (string line in lines) Console.WriteLine(line); Console.WriteLine(); // Redefine the newline characters to double space. Console.Out.NewLine = "\r\n\r\n"; // Output the lines using the new newline sequence. Console.WriteLine("With redefined new line characters:"); Console.WriteLine(); foreach (string line in lines) Console.WriteLine(line); } } // The example displays the following output: // With the default new line characters: // // This is the first line. // This is the second line. // // With redefined new line characters: // // // // This is the first line. // // This is the second line.
Remarks
If value is
null, only the line terminator is written to the standard output stream.
For more information about the line terminator, see the Remarks section of the WriteLine() method.
The following example demonstrates the use of alignment in formatting. The arguments that are formatted are placed between vertical bar characters (|) to highlight the resulting alignment.
string myFName = "Fred"; string myLName = "Opals"; int myInt = 100; string FormatFName = String.Format("First Name = |{0,10}|", myFName); string FormatLName = String.Format("Last Name = |{0,10}|", myLName); string FormatPrice = String.Format("Price = |{0,10:C}|", myInt); Console.WriteLine(FormatFName); Console.WriteLine(FormatLName); Console.WriteLine(FormatPrice); Console.WriteLine(); FormatFName = String.Format("First Name = |{0,-10}|", myFName); FormatLName = String.Format("Last Name = |{0,-10}|", myLName); FormatPrice = String.Format("Price = |{0,-10:C}|", myInt); Console.WriteLine(FormatFName); Console.WriteLine(FormatLName); Console.WriteLine(FormatPrice); // The example displays the following output on a system whose current // culture is en-US: // First Name = | Fred| // Last Name = | Opals| // Price = | $100.00| // // First Name = |Fred | // Last Name = |Opals | // Price = |$100.00 |
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