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BigInteger.Decrement Operator

Decrements a BigInteger value by 1.

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

public static BigInteger operator --(
	BigInteger value
)

Parameters

value
Type: System.Numerics.BigInteger

The value to decrement.

Return Value

Type: System.Numerics.BigInteger
The value of the value parameter decremented by 1.

The Decrement method defines the decrement operation for BigInteger values. It enables code such as the following:

BigInteger number = 93843112;
Console.WriteLine(--number);               // Displays 93843111

Languages that do not support custom operators can call the Subtract method instead. For example:

BigInteger number1 = BigInteger.Pow(Int32.MaxValue, 2);
number1 = BigInteger.Subtract(number1, BigInteger.One);

Because BigInteger objects are immutable, the Decrement operator creates a new BigInteger object whose value is one less than the BigInteger object represented by value. This means that repeated calls to Decrement may be expensive.

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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