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Decimal Constructors

Definition

Initializes a new instance of Decimal.

Overloads

Decimal(Double)

Initializes a new instance of Decimal to the value of the specified double-precision floating-point number.

Decimal(Int32)

Initializes a new instance of Decimal to the value of the specified 32-bit signed integer.

Decimal(Int32[])

Initializes a new instance of Decimal to a decimal value represented in binary and contained in a specified array.

Decimal(Int64)

Initializes a new instance of Decimal to the value of the specified 64-bit signed integer.

Decimal(ReadOnlySpan<Int32>)

Initializes a new instance of Decimal to a decimal value represented in binary and contained in the specified span.

Decimal(Single)

Initializes a new instance of Decimal to the value of the specified single-precision floating-point number.

Decimal(UInt32)

Initializes a new instance of Decimal to the value of the specified 32-bit unsigned integer.

Decimal(UInt64)

Initializes a new instance of Decimal to the value of the specified 64-bit unsigned integer.

Decimal(Int32, Int32, Int32, Boolean, Byte)

Initializes a new instance of Decimal from parameters specifying the instance's constituent parts.

Decimal(Double)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to the value of the specified double-precision floating-point number.

C#
public Decimal(double value);

Parameters

value
Double

The value to represent as a Decimal.

Exceptions

value is greater than Decimal.MaxValue or less than Decimal.MinValue.

-or-

value is NaN, PositiveInfinity, or NegativeInfinity.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with a Double value.

C#
// Example of the decimal( double ) constructor.
using System;

class DecimalCtorDoDemo
{
    // Get the exception type name; remove the namespace prefix.
    public static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' )+1 );
    }

    // Create a decimal object and display its value.
    public static void CreateDecimal( double value, string valToStr )
    {
        // Format and display the constructor.
        Console.Write( "{0,-34}",
            String.Format( "decimal( {0} )", valToStr ) );

        try
        {
            // Construct the decimal value.
            decimal decimalNum = new decimal( value );

            // Display the value if it was created successfully.
            Console.WriteLine( "{0,31}", decimalNum );
        }
        catch( Exception ex )
        {
            // Display the exception type if an exception was thrown.
            Console.WriteLine( "{0,31}", GetExceptionType( ex ) );
        }
    }

    public static void Main( )
    {
        Console.WriteLine( "This example of the decimal( double ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-34}{1,31}", "Constructor",
            "Value or Exception" );
        Console.WriteLine( "{0,-34}{1,31}", "-----------",
            "------------------" );

        // Construct decimal objects from double values.
        CreateDecimal( 1.23456789E+5, "1.23456789E+5" );
        CreateDecimal( 1.234567890123E+15, "1.234567890123E+15" );
        CreateDecimal( 1.2345678901234567E+25,
            "1.2345678901234567E+25" );
        CreateDecimal( 1.2345678901234567E+35,
            "1.2345678901234567E+35" );
        CreateDecimal( 1.23456789E-5, "1.23456789E-5" );
        CreateDecimal( 1.234567890123E-15, "1.234567890123E-15" );
        CreateDecimal( 1.2345678901234567E-25,
            "1.2345678901234567E-25" );
        CreateDecimal( 1.2345678901234567E-35,
            "1.2345678901234567E-35" );
        CreateDecimal( 1.0 / 7.0, "1.0 / 7.0" );
    }
}

/*
This example of the decimal( double ) constructor
generates the following output.

Constructor                                    Value or Exception
-----------                                    ------------------
decimal( 1.23456789E+5 )                               123456.789
decimal( 1.234567890123E+15 )                    1234567890123000
decimal( 1.2345678901234567E+25 )      12345678901234600000000000
decimal( 1.2345678901234567E+35 )               OverflowException
decimal( 1.23456789E-5 )                          0.0000123456789
decimal( 1.234567890123E-15 )       0.000000000000001234567890123
decimal( 1.2345678901234567E-25 )  0.0000000000000000000000001235
decimal( 1.2345678901234567E-35 )                               0
decimal( 1.0 / 7.0 )                            0.142857142857143
*/

Remarks

This constructor rounds value to 15 significant digits using rounding to nearest. This is done even if the number has more than 15 digits and the less significant digits are zero.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(Int32)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to the value of the specified 32-bit signed integer.

C#
public Decimal(int value);

Parameters

value
Int32

The value to represent as a Decimal.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with an Int32 value.

C#
// Example of the decimal( int ) constructor.
using System;

class DecimalCtorIDemo
{
    // Create a decimal object and display its value.
    public static void CreateDecimal( int value, string valToStr )
    {
        decimal decimalNum = new decimal( value );

        // Format the constructor for display.
        string ctor = String.Format( "decimal( {0} )", valToStr );

        // Display the constructor and its value.
        Console.WriteLine( "{0,-30}{1,16}", ctor, decimalNum );
    }

    public static void Main( )
    {
        Console.WriteLine( "This example of the decimal( int ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-30}{1,16}", "Constructor", "Value" );
        Console.WriteLine( "{0,-30}{1,16}", "-----------", "-----" );

        // Construct decimal objects from int values.
        CreateDecimal( int.MinValue, "int.MinValue" );
        CreateDecimal( int.MaxValue, "int.MaxValue" );
        CreateDecimal( 0, "0" );
        CreateDecimal( 999999999, "999999999" );
        CreateDecimal( 0x40000000, "0x40000000" );
        CreateDecimal( unchecked( (int)0xC0000000 ),
            "(int)0xC0000000" );
    }
}

/*
This example of the decimal( int ) constructor
generates the following output.

Constructor                              Value
-----------                              -----
decimal( int.MinValue )            -2147483648
decimal( int.MaxValue )             2147483647
decimal( 0 )                                 0
decimal( 999999999 )                 999999999
decimal( 0x40000000 )               1073741824
decimal( (int)0xC0000000 )         -1073741824
*/

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(Int32[])

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to a decimal value represented in binary and contained in a specified array.

C#
public Decimal(int[] bits);

Parameters

bits
Int32[]

An array of 32-bit signed integers containing a representation of a decimal value.

Exceptions

bits is null.

The length of the bits is not 4.

-or-

The representation of the decimal value in bits is not valid.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with an array of four Int32 values.

C#
// Example of the decimal( int[ ] ) constructor.
using System;

class DecimalCtorIArrDemo
{
    // Get the exception type name; remove the namespace prefix.
    public static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    // Create a decimal object and display its value.
    public static void CreateDecimal( int[ ] bits )
    {
        // Format the constructor for display.
        string ctor = String.Format(
            "decimal( {{ 0x{0:X}", bits[ 0 ] );
        string valOrExc;

        for( int index = 1; index < bits.Length; index++ )
            ctor += String.Format( ", 0x{0:X}", bits[ index ] );
        ctor += " } )";

        try
        {
            // Construct the decimal value.
            decimal decimalNum = new decimal( bits );

            // Format the decimal value for display.
            valOrExc = decimalNum.ToString( );
        }
        catch( Exception ex )
        {
            // Save the exception type if an exception was thrown.
            valOrExc = GetExceptionType( ex );
        }

        // Display the constructor and decimal value or exception.
        int ctorLen = 76 - valOrExc.Length;

        // Display the data on one line if it will fit.
        if( ctorLen > ctor.Length )
            Console.WriteLine( "{0}{1}", ctor.PadRight( ctorLen ),
                valOrExc );

        // Otherwise, display the data on two lines.
        else
        {
            Console.WriteLine( "{0}", ctor );
            Console.WriteLine( "{0,76}", valOrExc );
        }
    }

    public static void Main( )
    {
        Console.WriteLine(
            "This example of the decimal( int[ ] ) constructor " +
            "\ngenerates the following output.\n" );
        Console.WriteLine( "{0,-38}{1,38}", "Constructor",
            "Value or Exception" );
        Console.WriteLine( "{0,-38}{1,38}", "-----------",
            "------------------" );

        // Construct decimal objects from integer arrays.
        CreateDecimal( new int[ ] { 0, 0, 0, 0 } );
        CreateDecimal( new int[ ] { 0, 0, 0 } );
        CreateDecimal( new int[ ] { 0, 0, 0, 0, 0 } );
        CreateDecimal( new int[ ] { 1000000000, 0, 0, 0 } );
        CreateDecimal( new int[ ] { 0, 1000000000, 0, 0 } );
        CreateDecimal( new int[ ] { 0, 0, 1000000000, 0 } );
        CreateDecimal( new int[ ] { 0, 0, 0, 1000000000 } );
        CreateDecimal( new int[ ] { -1, -1, -1, 0 } );
        CreateDecimal( new int[ ]
            { -1, -1, -1, unchecked( (int)0x80000000 ) } );
        CreateDecimal( new int[ ] { -1, 0, 0, 0x100000 } );
        CreateDecimal( new int[ ] { -1, 0, 0, 0x1C0000 } );
        CreateDecimal( new int[ ] { -1, 0, 0, 0x1D0000 } );
        CreateDecimal( new int[ ] { -1, 0, 0, 0x1C0001 } );
        CreateDecimal( new int[ ]
            { 0xF0000, 0xF0000, 0xF0000, 0xF0000 } );
    }
}

/*
This example of the decimal( int[ ] ) constructor
generates the following output.

Constructor                                               Value or Exception
-----------                                               ------------------
decimal( { 0x0, 0x0, 0x0, 0x0 } )                                          0
decimal( { 0x0, 0x0, 0x0 } )                               ArgumentException
decimal( { 0x0, 0x0, 0x0, 0x0, 0x0 } )                     ArgumentException
decimal( { 0x3B9ACA00, 0x0, 0x0, 0x0 } )                          1000000000
decimal( { 0x0, 0x3B9ACA00, 0x0, 0x0 } )                 4294967296000000000
decimal( { 0x0, 0x0, 0x3B9ACA00, 0x0 } )       18446744073709551616000000000
decimal( { 0x0, 0x0, 0x0, 0x3B9ACA00 } )                   ArgumentException
decimal( { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0 } )
                                               79228162514264337593543950335
decimal( { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x80000000 } )
                                              -79228162514264337593543950335
decimal( { 0xFFFFFFFF, 0x0, 0x0, 0x100000 } )             0.0000004294967295
decimal( { 0xFFFFFFFF, 0x0, 0x0, 0x1C0000 } ) 0.0000000000000000004294967295
decimal( { 0xFFFFFFFF, 0x0, 0x0, 0x1D0000 } )              ArgumentException
decimal( { 0xFFFFFFFF, 0x0, 0x0, 0x1C0001 } )              ArgumentException
decimal( { 0xF0000, 0xF0000, 0xF0000, 0xF0000 } )
                                                 18133887298.441562272235520
*/

Remarks

The binary representation of a Decimal number consists of a 1-bit sign, a 96-bit integer number, and a scaling factor used to divide the integer number and specify what portion of it is a decimal fraction. The scaling factor is implicitly the number 10, raised to an exponent ranging from 0 to 28.

bits is a four-element long array of 32-bit signed integers.

bits [0], bits [1], and bits [2] contain the low, middle, and high 32 bits of the 96-bit integer number.

bits [3] contains the scale factor and sign, and consists of following parts:

Bits 0 to 15, the lower word, are unused and must be zero.

Bits 16 to 23 must contain an exponent between 0 and 28, which indicates the power of 10 to divide the integer number.

Bits 24 to 30 are unused and must be zero.

Bit 31 contains the sign; 0 meaning positive, and 1 meaning negative.

A numeric value might have several possible binary representations; all are equally valid and numerically equivalent. Note that the bit representation differentiates between negative and positive zero. These values are treated as being equal in all operations.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(Int64)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to the value of the specified 64-bit signed integer.

C#
public Decimal(long value);

Parameters

value
Int64

The value to represent as a Decimal.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with an Int64 value.

C#
// Example of the decimal( long ) constructor.
using System;

class DecimalCtorLDemo
{
    // Create a decimal object and display its value.
    public static void CreateDecimal( long value, string valToStr )
    {
        decimal decimalNum = new decimal( value );

        // Format the constructor for display.
        string ctor = String.Format( "decimal( {0} )", valToStr );

        // Display the constructor and its value.
        Console.WriteLine( "{0,-35}{1,22}", ctor, decimalNum );
    }

    public static void Main( )
    {
        Console.WriteLine( "This example of the decimal( long ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-35}{1,22}", "Constructor", "Value" );
        Console.WriteLine( "{0,-35}{1,22}", "-----------", "-----" );

        // Construct decimal objects from long values.
        CreateDecimal( long.MinValue, "long.MinValue" );
        CreateDecimal( long.MaxValue, "long.MaxValue" );
        CreateDecimal( 0L, "0L" );
        CreateDecimal( 999999999999999999, "999999999999999999" );
        CreateDecimal( 0x2000000000000000, "0x2000000000000000" );
        CreateDecimal( unchecked( (long)0xE000000000000000 ),
            "(long)0xE000000000000000" );
    }
}

/*
This example of the decimal( long ) constructor
generates the following output.

Constructor                                         Value
-----------                                         -----
decimal( long.MinValue )             -9223372036854775808
decimal( long.MaxValue )              9223372036854775807
decimal( 0 )                                            0
decimal( 999999999999999999 )          999999999999999999
decimal( 0x2000000000000000 )         2305843009213693952
decimal( (long)0xE000000000000000 )  -2305843009213693952
*/

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(ReadOnlySpan<Int32>)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to a decimal value represented in binary and contained in the specified span.

C#
public Decimal(ReadOnlySpan<int> bits);

Parameters

bits
ReadOnlySpan<Int32>

A span of four Int32 values that contains a binary representation of a decimal value.

Exceptions

The length of bits is not 4, or the representation of the decimal value in bits is not valid.

Applies to

.NET 9 and other versions
Product Versions
.NET 5, 6, 7, 8, 9

Decimal(Single)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal to the value of the specified single-precision floating-point number.

C#
public Decimal(float value);

Parameters

value
Single

The value to represent as a Decimal.

Exceptions

value is greater than Decimal.MaxValue or less than Decimal.MinValue.

-or-

value is NaN, PositiveInfinity, or NegativeInfinity.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with a Single value.

C#
// Example of the decimal( float ) constructor.
using System;

class DecimalCtorSDemo
{
    // Get the exception type name; remove the namespace prefix.
    public static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    // Create a decimal object and display its value.
    public static void CreateDecimal( float value, string valToStr )
    {
        // Format and display the constructor.
        Console.Write( "{0,-27}",
            String.Format( "decimal( {0} )", valToStr ) );

        try
        {
            // Construct the decimal value.
            decimal decimalNum = new decimal( value );

            // Display the value if it was created successfully.
            Console.WriteLine( "{0,31}", decimalNum );
        }
        catch( Exception ex )
        {
            // Display the exception type if an exception was thrown.
            Console.WriteLine( "{0,31}", GetExceptionType( ex ) );
        }
    }

    public static void Main( )
    {

        Console.WriteLine( "This example of the decimal( float ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-27}{1,31}", "Constructor",
            "Value or Exception" );
        Console.WriteLine( "{0,-27}{1,31}", "-----------",
            "------------------" );

        // Construct decimal objects from float values.
        CreateDecimal( 1.2345E+5F, "1.2345E+5F" );
        CreateDecimal( 1.234567E+15F, "1.234567E+15F" );
        CreateDecimal( 1.23456789E+25F, "1.23456789E+25F" );
        CreateDecimal( 1.23456789E+35F, "1.23456789E+35F" );
        CreateDecimal( 1.2345E-5F, "1.2345E-5F" );
        CreateDecimal( 1.234567E-15F, "1.234567E-15F" );
        CreateDecimal( 1.23456789E-25F, "1.23456789E-25F" );
        CreateDecimal( 1.23456789E-35F, "1.23456789E-35F" );
        CreateDecimal( 1.0F / 7.0F, "1.0F / 7.0F" );
    }
}

/*
This example of the decimal( float ) constructor
generates the following output.

Constructor                             Value or Exception
-----------                             ------------------
decimal( 1.2345E+5F )                               123450
decimal( 1.234567E+15F )                  1234567000000000
decimal( 1.23456789E+25F )      12345680000000000000000000
decimal( 1.23456789E+35F )               OverflowException
decimal( 1.2345E-5F )                          0.000012345
decimal( 1.234567E-15F )           0.000000000000001234567
decimal( 1.23456789E-25F )  0.0000000000000000000000001235
decimal( 1.23456789E-35F )                               0
decimal( 1.0F / 7.0F )                           0.1428571
*/

Remarks

This constructor rounds value to 7 significant digits using rounding to nearest. This is done even if the number has more than 7 digits and the less significant digits are zero.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(UInt32)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Important

This API is not CLS-compliant.

Initializes a new instance of Decimal to the value of the specified 32-bit unsigned integer.

C#
[System.CLSCompliant(false)]
public Decimal(uint value);

Parameters

value
UInt32

The value to represent as a Decimal.

Attributes

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with a UInt32 value.

C#
// Example of the decimal( uint ) constructor.
using System;

class DecimalCtorUIDemo
{
    // Create a decimal object and display its value.
    public static void CreateDecimal( uint value, string valToStr )
    {
        decimal decimalNum = new decimal( value );

        // Format the constructor for display.
        string ctor = String.Format( "decimal( {0} )", valToStr );

        // Display the constructor and its value.
        Console.WriteLine( "{0,-33}{1,16}", ctor, decimalNum );
    }

    public static void Main( )
    {
        Console.WriteLine( "This example of the decimal( uint ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-33}{1,16}", "Constructor", "Value" );
        Console.WriteLine( "{0,-33}{1,16}", "-----------", "-----" );

        // Construct decimal objects from uint values.
        CreateDecimal( uint.MinValue, "uint.MinValue" );
        CreateDecimal( uint.MaxValue, "uint.MaxValue" );
        CreateDecimal( (uint)int.MaxValue, "(uint)int.MaxValue" );
        CreateDecimal( 999999999U, "999999999U" );
        CreateDecimal( 0x40000000U, "0x40000000U" );
        CreateDecimal( 0xC0000000, "0xC0000000" );
    }
}

/*
This example of the decimal( uint ) constructor
generates the following output.

Constructor                                 Value
-----------                                 -----
decimal( uint.MinValue )                        0
decimal( uint.MaxValue )               4294967295
decimal( (uint)int.MaxValue )          2147483647
decimal( 999999999U )                   999999999
decimal( 0x40000000U )                 1073741824
decimal( 0xC0000000 )                  3221225472
*/

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(UInt64)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Important

This API is not CLS-compliant.

Initializes a new instance of Decimal to the value of the specified 64-bit unsigned integer.

C#
[System.CLSCompliant(false)]
public Decimal(ulong value);

Parameters

value
UInt64

The value to represent as a Decimal.

Attributes

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with a UInt64 value.

C#
// Example of the decimal( ulong ) constructor.
using System;

class DecimalCtorLDemo
{
    // Create a decimal object and display its value.
    public static void CreateDecimal( ulong value, string valToStr )
    {
        decimal decimalNum = new decimal( value );

        // Format the constructor for display.
        string ctor = String.Format( "decimal( {0} )", valToStr );

        // Display the constructor and its value.
        Console.WriteLine( "{0,-35}{1,22}", ctor, decimalNum );
    }

    public static void Main( )
    {
        Console.WriteLine( "This example of the decimal( ulong ) " +
            "constructor \ngenerates the following output.\n" );
        Console.WriteLine( "{0,-35}{1,22}", "Constructor", "Value" );
        Console.WriteLine( "{0,-35}{1,22}", "-----------", "-----" );

        // Construct decimal objects from ulong values.
        CreateDecimal( ulong.MinValue, "ulong.MinValue" );
        CreateDecimal( ulong.MaxValue, "ulong.MaxValue" );
        CreateDecimal( long.MaxValue, "long.MaxValue" );
        CreateDecimal( 999999999999999999, "999999999999999999" );
        CreateDecimal( 0x2000000000000000, "0x2000000000000000" );
        CreateDecimal( 0xE000000000000000, "0xE000000000000000" );
    }
}

/*
This example of the decimal( ulong ) constructor
generates the following output.

Constructor                                         Value
-----------                                         -----
decimal( ulong.MinValue )                               0
decimal( ulong.MaxValue )            18446744073709551615
decimal( long.MaxValue )              9223372036854775807
decimal( 999999999999999999 )          999999999999999999
decimal( 0x2000000000000000 )         2305843009213693952
decimal( 0xE000000000000000 )        16140901064495857664
*/

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

Decimal(Int32, Int32, Int32, Boolean, Byte)

Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Initializes a new instance of Decimal from parameters specifying the instance's constituent parts.

C#
public Decimal(int lo, int mid, int hi, bool isNegative, byte scale);

Parameters

lo
Int32

The low 32 bits of a 96-bit integer.

mid
Int32

The middle 32 bits of a 96-bit integer.

hi
Int32

The high 32 bits of a 96-bit integer.

isNegative
Boolean

true to indicate a negative number; false to indicate a positive number.

scale
Byte

A power of 10 ranging from 0 to 28.

Exceptions

scale is greater than 28.

Examples

The following code example creates several Decimal numbers using the constructor overload that initializes a Decimal structure with three Int32 value words, a Boolean sign, and a Byte scale factor.

C#
// Example of the decimal( int, int, int, bool, byte ) constructor.
using System;

class DecimalCtorIIIBByDemo
{
    // Get the exception type name; remove the namespace prefix.
    public static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    // Create a decimal object and display its value.
    public static void CreateDecimal( int low, int mid, int high,
        bool isNeg, byte scale )
    {
        // Format the constructor for display.
        string ctor = String.Format(
            "decimal( {0}, {1}, {2}, {3}, {4} )",
            low, mid, high, isNeg, scale );
        string valOrExc;

        try
        {
            // Construct the decimal value.
            decimal decimalNum = new decimal(
                low, mid, high, isNeg, scale );

            // Format and save the decimal value.
            valOrExc = decimalNum.ToString( );
        }
        catch( Exception ex )
        {
            // Save the exception type if an exception was thrown.
            valOrExc = GetExceptionType( ex );
        }

        // Display the constructor and decimal value or exception.
        int ctorLen = 76 - valOrExc.Length;

        // Display the data on one line if it will fit.
        if ( ctorLen > ctor.Length )
            Console.WriteLine( "{0}{1}", ctor.PadRight( ctorLen ),
                valOrExc );

        // Otherwise, display the data on two lines.
        else
        {
            Console.WriteLine( "{0}", ctor );
            Console.WriteLine( "{0,76}", valOrExc );
        }
    }

    public static void Main( )
    {

        Console.WriteLine( "This example of the decimal( int, int, " +
            "int, bool, byte ) \nconstructor " +
            "generates the following output.\n" );
        Console.WriteLine( "{0,-38}{1,38}", "Constructor",
            "Value or Exception" );
        Console.WriteLine( "{0,-38}{1,38}", "-----------",
            "------------------" );

        // Construct decimal objects from the component fields.
        CreateDecimal( 0, 0, 0, false, 0 );
        CreateDecimal( 0, 0, 0, false, 27 );
        CreateDecimal( 0, 0, 0, true, 0 );
        CreateDecimal( 1000000000, 0, 0, false, 0 );
        CreateDecimal( 0, 1000000000, 0, false, 0 );
        CreateDecimal( 0, 0, 1000000000, false, 0 );
        CreateDecimal( 1000000000, 1000000000, 1000000000, false, 0 );
        CreateDecimal( -1, -1, -1, false, 0 );
        CreateDecimal( -1, -1, -1, true, 0 );
        CreateDecimal( -1, -1, -1, false, 15 );
        CreateDecimal( -1, -1, -1, false, 28 );
        CreateDecimal( -1, -1, -1, false, 29 );
        CreateDecimal( int.MaxValue, 0, 0, false, 18 );
        CreateDecimal( int.MaxValue, 0, 0, false, 28 );
        CreateDecimal( int.MaxValue, 0, 0, true, 28 );
    }
}

/*
This example of the decimal( int, int, int, bool, byte )
constructor generates the following output.

Constructor                                               Value or Exception
-----------                                               ------------------
decimal( 0, 0, 0, False, 0 )                                               0
decimal( 0, 0, 0, False, 27 )                                              0
decimal( 0, 0, 0, True, 0 )                                                0
decimal( 1000000000, 0, 0, False, 0 )                             1000000000
decimal( 0, 1000000000, 0, False, 0 )                    4294967296000000000
decimal( 0, 0, 1000000000, False, 0 )          18446744073709551616000000000
decimal( 1000000000, 1000000000, 1000000000, False, 0 )
                                               18446744078004518913000000000
decimal( -1, -1, -1, False, 0 )                79228162514264337593543950335
decimal( -1, -1, -1, True, 0 )                -79228162514264337593543950335
decimal( -1, -1, -1, False, 15 )              79228162514264.337593543950335
decimal( -1, -1, -1, False, 28 )              7.9228162514264337593543950335
decimal( -1, -1, -1, False, 29 )                 ArgumentOutOfRangeException
decimal( 2147483647, 0, 0, False, 18 )                  0.000000002147483647
decimal( 2147483647, 0, 0, False, 28 )        0.0000000000000000002147483647
decimal( 2147483647, 0, 0, True, 28 )        -0.0000000000000000002147483647
*/

The following example uses the GetBits method to retrieve the component parts of an array. It then uses this array in the call to the Decimal(Int32, Int32, Int32, Boolean, Byte) constructor to instantiate a new Decimal value.

C#
using System;

public class Example
{
   public static void Main()
   {
      Decimal[] values = { 1234.96m, -1234.96m };
      foreach (var value in values) {
         int[] parts = Decimal.GetBits(value);
         bool sign = (parts[3] & 0x80000000) != 0;

         byte scale = (byte) ((parts[3] >> 16) & 0x7F);
         Decimal newValue = new Decimal(parts[0], parts[1], parts[2], sign, scale);
         Console.WriteLine("{0} --> {1}", value, newValue);
      }
   }
}
// The example displays the following output:
//       1234.96 --> 1234.96
//       -1234.96 --> -1234.96

Remarks

The binary representation of a Decimal number consists of a 1-bit sign, a 96-bit integer number, and a scaling factor used to divide the integer number and specify what portion of it is a decimal fraction. The scaling factor is implicitly the number 10 raised to an exponent ranging from 0 to 28.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0