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BigInteger Constructor (Int32)

Initializes a new instance of the BigInteger structure using a 32-bit signed integer value.

Namespace:  System.Numerics
Assemblies:   System.Runtime.Numerics (in System.Runtime.Numerics.dll)
  System.Numerics (in System.Numerics.dll)

public BigInteger(
	int value
)

Parameters

value
Type: System.Int32

A 32-bit signed integer.

There is no loss of precision when instantiating a BigInteger object by using this constructor.

The BigInteger value that results from calling this constructor is identical to the value that results from assigning an Int32 value to a BigInteger.

The BigInteger structure does not include constructors with a parameter of type Byte, Int16, SByte, or UInt16. However, the Int32 type supports the implicit conversion of 8-bit and 16-bit signed and unsigned integers to signed 32-bit integers. As a result, this constructor is called if value is any one of these four integral types.

The following example calls the BigInteger(Int32) constructor to instantiate BigInteger values from an array of 32-bit integers. It also uses implicit conversion to assign each 32-bit integer value to a BigInteger variable. It then compares the two values to establish that the resulting BigInteger values are the same.

int[] integers = { Int32.MinValue, -10534, -189, 0, 17, 113439,
                   Int32.MaxValue };
BigInteger constructed, assigned;

foreach (int number in integers)
{
   constructed = new BigInteger(number);
   assigned = number;
   Console.WriteLine("{0} = {1}: {2}", constructed, assigned, 
                     constructed.Equals(assigned)); 
}                                                  
// The example displays the following output: 
//       -2147483648 = -2147483648: True 
//       -10534 = -10534: True 
//       -189 = -189: True 
//       0 = 0: True 
//       17 = 17: True 
//       113439 = 113439: True 
//       2147483647 = 2147483647: True      

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1
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