Formatting numeric results table (C# Reference)

The following table shows supported format specifiers for formatting numeric results. The formatted result in the last column corresponds to the "en-US" CultureInfo.

Format specifier Description Examples Result
C or c Currency string s = $"{2.5:C}";

string s = $"{-2.5:C}";
$2.50

($2.50)
D or d Decimal string s = $"{25:D5}"; 00025
E or e Exponential string s = $"{250000:E2}"; 2.50E+005
F or f Fixed-point string s = $"{2.5:F2}";

string s = $"{2.5:F0}";
2.50

3
G or g General string s = $"{2.5:G}"; 2.5
N or n Numeric string s = $"{2500000:N}"; 2,500,000.00
P or p Percent string s = $"{0.25:P}"; 25.00%
R or r Round-trip string s = $"{2.5:R}"; 2.5
X or x Hexadecimal string s = $"{250:X}";

string s = $"{0xffff:X}";
FA

FFFF

Remarks

You use a format specifier to create a format string. The format string is of the following form: Axx, where

  • A is the format specifier, which controls the type of formatting applied to the numeric value.
  • xx is the precision specifier, which affects the number of digits in the formatted output. The value of the precision specifier ranges from 0 to 99.

The decimal ("D" or "d") and hexadecimal ("X" or "x") format specifiers are supported only for integral types. The round-trip ("R" or "r") format specifier is supported only for Single, Double, and BigInteger types.

Standard numeric format strings are supported by:

For more information, see Standard Numeric Format Strings.

See also