Decimal.ToSingle Method (Decimal)


Converts the value of the specified Decimal to the equivalent single-precision floating-point number.

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

public static float ToSingle(
	decimal d


Type: System.Decimal

The decimal number to convert.

Return Value

Type: System.Single

A single-precision floating-point number equivalent to the value of d.

This operation can produce round-off errors because a single-precision floating-point number has fewer significant digits than a Decimal.

You can also convert a Decimal to a Single value by using the Explicit(Decimal to Single) assignment operator. Because the conversion can entail a loss of precision, you must use a casting operator in C# or a conversion function in Visual Basic.

The following code example converts Decimal numbers to Single values using the ToSingle method.

// Example of the decimal.ToSingle and decimal.ToDouble methods.
using System;

class DecimalToSgl_DblDemo
    static string formatter = "{0,30}{1,17}{2,23}";

    // Convert the decimal argument; no exceptions are thrown.
    public static void DecimalToSgl_Dbl( decimal argument )
        object SingleValue;
        object DoubleValue;

        // Convert the argument to a float value.
        SingleValue = decimal.ToSingle( argument );

        // Convert the argument to a double value.
        DoubleValue = decimal.ToDouble( argument );

        Console.WriteLine( formatter, argument, 
            SingleValue, DoubleValue );

    public static void Main( )
        Console.WriteLine( "This example of the \n" +
            "  decimal.ToSingle( decimal ) and \n" +
            "  decimal.ToDouble( decimal ) \nmethods " +
            "generates the following output. It \ndisplays " +
            "several converted decimal values.\n" );
        Console.WriteLine( formatter, "decimal argument", 
            "float", "double" );
        Console.WriteLine( formatter, "----------------", 
            "-----", "------" );

        // Convert decimal values and display the results.
        DecimalToSgl_Dbl( 0.0000000000000000000000000001M );
        DecimalToSgl_Dbl( 0.0000000000123456789123456789M );
        DecimalToSgl_Dbl( 123M );
        DecimalToSgl_Dbl( new decimal( 123000000, 0, 0, false, 6 ) );
        DecimalToSgl_Dbl( 123456789.123456789M );
        DecimalToSgl_Dbl( 123456789123456789123456789M );
        DecimalToSgl_Dbl( decimal.MinValue );
        DecimalToSgl_Dbl( decimal.MaxValue );

This example of the
  decimal.ToSingle( decimal ) and
  decimal.ToDouble( decimal )
methods generates the following output. It
displays several converted decimal values.

              decimal argument            float                 double
              ----------------            -----                 ------
0.0000000000000000000000000001            1E-28                  1E-28
0.0000000000123456789123456789     1.234568E-11   1.23456789123457E-11
                           123              123                    123
                    123.000000              123                    123
           123456789.123456789     1.234568E+08       123456789.123457
   123456789123456789123456789     1.234568E+26   1.23456789123457E+26
-79228162514264337593543950335    -7.922816E+28  -7.92281625142643E+28
 79228162514264337593543950335     7.922816E+28   7.92281625142643E+28

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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