Double::ToString Method ()
Converts the numeric value of this instance to its equivalent string representation.
Assembly: mscorlib (in mscorlib.dll)
The ToString() method formats a Double value in the default ("G", or general) format of the current culture. If you want to specify a different format, precision, or culture, use the other overloads of the ToString method, as follows:
To use format | For culture | Use the overload |
|---|---|---|
Default ("G") format | A specific culture | |
A specific format or precision | Default (current) culture | |
A specific format or precision | A specific culture |
The return value can be PositiveInfinitySymbol, NegativeInfinitySymbol, NaNSymbol, or a string of the form:
[sign]integral-digits[.[fractional-digits]][e[sign]exponential-digits]
Optional elements are framed in square brackets ([ and ]). Elements that contain the term "digits" consist of a series of numeric characters ranging from 0 to 9. The elements listed in the following table are supported.
Element | Description |
|---|---|
sign | A negative sign or positive sign symbol. |
integral-digits | A series of digits specifying the integral part of the number. Integral-digits can be absent if there are fractional-digits. |
'.' | A culture-specific decimal point symbol. |
fractional-digits | A series of digits specifying the fractional part of the number. |
'e' | A lowercase character 'e', indicating exponential (scientific) notation. |
exponential-digits | A series of digits specifying an exponent. |
Some examples of the return value are "100", "-123,456,789", "123.45e+6", "500", "3.1416", "600", "-0.123", and "-Infinity".
The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics:
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about formatting, see Formatting Types in the .NET Framework.
The following example uses the default Double::ToString() method to display the string representations of a number of Double values.
The following example illustrates the use of ToString.
bool done = false; String^ inp; do { Console::Write( "Enter a real number: " ); inp = Console::ReadLine(); try { d = Double::Parse( inp ); Console::WriteLine( "You entered {0}.", d ); done = true; } catch ( FormatException^ ) { Console::WriteLine( "You did not enter a number." ); } catch ( Exception^ e ) { Console::WriteLine( "An exception occurred while parsing your response: {0}", e ); } } while ( !done );
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1