"C" or "c"

Currency

Result: A currency value.
Supported by: All numeric types.
Precision specifier: Number of decimal digits.
Default precision specifier: Based on current culture.

123.456 ("C", en-US) -> $123.46
123.456 ("C", fr-FR) -> 123,46 €
123.456 ("C", ja-JP) -> ¥123
-123.456 ("C3", en-US) -> ($123.456)
-123.456 ("C3", fr-FR) -> -123,456 €
-123.456 ("C3", ja-JP) -> -¥123.456

"D" or "d"

Decimal

Result: Integer digits with optional negative sign.
Supported by: Integral types only.
Precision specifier: Minimum number of digits.
Default precision specifier: Minimum number of digits required.

1234 ("D") -> 1234
-1234 ("D6") -> -001234

"E" or "e"

Exponential (scientific)

Result: Exponential notation.
Supported by: All numeric types.
Precision specifier: Number of decimal digits.
Default precision specifier: 6.

1052.0329112756 ("E", en-US) -> 1.052033E+003
1052.0329112756 ("e", fr-FR) -> 1,052033e+003
-1052.0329112756 ("e2", en-US) -> -1.05e+003
-1052.0329112756 ("E2", fr_FR) -> -1,05E+003

"F" or "f"

Fixed-point

Result: Integral and decimal digits with optional negative sign.
Supported by: All numeric types.
Precision specifier: Number of decimal digits.
Default precision specifier: Based on current culture.

1234.567 ("F", en-US) -> 1234.57
1234.567 ("F", de-DE) -> 1234,57
1234 ("F1", en-US) -> 1234.0
1234 ("F1", de-DE) -> 1234,0
-1234.56 ("F4", en-US) -> -1234.5600
-1234.56 ("F4", de-DE) -> -1234,5000

"G" or "g"

General

Result: The most compact of either fixed-point or scientific notation.
Supported by: All numeric types.
Precision specifier: Number of significant digits.
Default precision specifier: Depends on numeric type..

-123.456 ("G", en-US) -> -123.456
123.456 ("G", sv-SE) -> -123,456
123.4546 ("G4", en-US) -> 123.5
123.4546 ("G4", sv-SE) -> 123,5
-1.234567890e-25 ("G", en-US) -> -1.23456789E-25
-1.234567890e-25 ("G", sv-SE) -> -1,23456789E-25

"N" or "n"

Number

Result: Integral and decimal digits, group separators, and a decimal separator with optional negative sign.
Supported by: All numeric types.
Precision specifier: Desired number of decimal places.
Default precision specifier: Based on current culture.

1234.567 ("N", en-US) -> 1,234.57
1234.567 ("N", ru-RU) -> 1 234,57
1234 ("N", en-US) -> 1,234.0
1234 ("N", ru-RU) -> 1 234,0
-1234.56 ("N", en-US) -> -1,234.560
-1234.56 ("N", ru-RU) -> -1 234,560

P or p

Percent

Result: Number multiplied by 100 and displayed with a percent symbol.
Supported by: All numeric types.
Precision specifier: Desired number of decimal places.
Default precision specifier: Based on current culture.

1 ("P", en-US) -> 100.00 %
1 ("P", fr-FR) -> 100,00 %
-0.39678 ("P1", en-US) -> -39.7 %
-0.39678 ("P1", fr-FR) -> -39,7 %

X or x

Hexadecimal

Result: A hexadecimal string.
Supported by: Integral types only.
Precision specifier: Number of digits in the result string.

255 ("X") -> FF
-1 ("x") -> ff
255 ("x4") -> 00ff
-1 ("X4") -> 00FF

Any other single character

Unknown specifier

Result: error

"0"

Zero placeholder

Replaces the zero with the corresponding digit if one is present; otherwise, zero appears in the result string.

1234.5678 ("00000") -> 01235
0.45678 ("0.00", en-US) -> 0.46
0.45678 ("0.00", fr-FR) -> 0,46

"#"

Digit placeholder

Replaces the pound sign with the corresponding digit if one is present; otherwise, no digit appears in the result string.

1234.5678 ("#####") -> 1235
0.45678 ("#.##", en-US) -> .46
0.45678 ("#.##", fr-FR) -> ,46

"."

Decimal point

Determines the location of the decimal separator in the result string.

0.45678 ("0.00", en-US) -> 0.46
0.45678 ("0.00", fr-FR) -> 0,46

","

Group separator and number scaling

Serves as both a group separator and a number scaling specifier. As a group separator, it inserts a localized group separator character between each group. As a number scaling specifier, it divides a number by 1000 for each comma specified.

Group separator specifier:
2147483647 ("##,#", en-US) -> 2,147,483,647
2147483647 ("##,#", es-ES) -> 2.147.483.647

Scaling specifier:
2147483647 ("#,#,,", en-US) -> 2,147
2147483647 ("#,#,,", es-ES) -> 2.147

"%"

Percentage placeholder

Multiplies a number by 100 and inserts a localized percentage symbol in the result string.

0.3697 ("%#0.00", en-US) -> %36.97
0.3697 ("%#0.00", el-GR) -> %36,97
0.3697 ("##.0 %", en-US) -> 37.0 %
0.3697 ("##.0 %", el-GR) -> 37,0 %

"‰"

Per mille placeholder

Multiplies a number by 1000 and inserts a localized per mille symbol in the result string.

0.03697 ("#0.00‰", en-US) -> 36.97‰
0.03697 ("#0.00‰", ru-RU) -> 36,97‰

"E0"

"E+0"

"E-0"

"e0"

"e+0"

"e-0"

Exponential notation

If followed by at least one 0 (zero), formats the result using exponential notation. The case of "E" or "e" indicates the case of the exponent symbol in the result string. The number of zeros following the "E" or "e" character determines the minimum number of digits in the exponent. A plus sign (+) indicates that a sign character always precedes the exponent. A minus sign (-) indicates that a sign character precedes only negative exponents.

987654 ("#0.0e0") -> 98.8e4
1503.92311 ("0.0##e+00") -> 1.504e+03
1.8901385E-16 ("0.0e+00") -> 1.9e-16

\

Escape character

Causes the next character to be interpreted as a literal rather than as a custom format specifier.

987654 ("\###00\#") -> #987654#

'string'

"string"

Literal string delimiter

Indicates that the enclosed characters should be copied to the result string unchanged.

68 ("# ' degrees'") -> 68 degrees
68 ("#' degrees'") -> 68 degrees

;

Section separator

Defines sections with separate format strings for positive, negative, and zero numbers.

12.345 ("#0.0#;(#0.0#);-\0-") -> 12.35
0 ("#0.0#;(#0.0#);-\0-") -> -0-
-12.345 ("#0.0#;(#0.0#);-\0-") -> (12.35)
12.345 ("#0.0#;(#0.0#)") -> 12.35
0 ("#0.0#;(#0.0#)") -> 0.0
-12.345 ("#0.0#;(#0.0#)") -> (12.35)

Other

All other characters

The character is copied to the result string unchanged.

68 ("# °") -> 68 °