Single.ToString Method ()

 

Converts the numeric value of this instance to its equivalent string representation.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

public override string ToString()

Return Value

Type: System.String

The string representation of the value of this instance.

The ToString() method formats a Single value in the default ("G", or general) format of the current culture. If you want to specify a different format 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

ToString(IFormatProvider)

A specific format

Default (current) culture

ToString(String)

A specific format

A specific culture

ToString(String, IFormatProvider)

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 following table lists each element:

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:

The following example uses the default Single.ToString method to display the string representations of a number of Single values.

float number;

number = 1.6E20F;
// Displays 1.6E+20.
Console.WriteLine(number.ToString());

number = 1.6E2F;
// Displays 160.
Console.WriteLine(number.ToString());

number = -3.541F;
// Displays -3.541.
Console.WriteLine(number.ToString());

number = -1502345222199E-07F;
// Displays -150234.5222199.
Console.WriteLine(number.ToString());

number = -15023452221990199574E-09F;
// Displays -15023452221.9902.
Console.WriteLine(number.ToString());

number = .60344F;
// Displays 0.60344.
Console.WriteLine(number.ToString());

number = .000000001F;
// Displays 1E-09.
Console.WriteLine(number.ToString());

The following code example illustrates the use of the Parse(String) method along with the ToString() method.

bool done = false;
string inp;
do
{
    Console.Write("Enter a real number: ");
    inp = Console.ReadLine();
    try
    {
        s = Single.Parse(inp);
        Console.WriteLine("You entered {0}.", s.ToString());
        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.ToString());
    }
} while (!done);

Universal Windows Platform
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
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