Single.ToString Method

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:

Some examples of the return value are "100", "-123,456,789", "123.45e+6", "500", "3.1416", "600", "-0.123", and "-Infinity".

This overload of the ToString method implicitly uses the general numeric format specifier ("G") and the NumberFormatInfo object for the current culture.

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.

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);

.NET Framework

.NET Framework Client Profile

Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

Other Resources