Math.Pow Method (System)

Pow Method

.NET Framework Class Library

Math..::.Pow Method

Updated: August 2009

Returns a specified number raised to the specified power.

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

Syntax

Visual Basic (Declaration)

Public Shared Function Pow ( _
    x As Double, _
    y As Double _
) As Double

Visual Basic (Usage)

Dim x As Double
Dim y As Double
Dim returnValue As Double

returnValue = Math.Pow(x, y)

public static double Pow(
    double x,
    double y
)

Visual C++

public:
static double Pow(
    double x, 
    double y
)

JScript

public static function Pow(
    x : double, 
    y : double
) : double

Parameters

x: Type: System..::.Double
A double-precision floating-point number to be raised to a power.

y: Type: System..::.Double
A double-precision floating-point number that specifies a power.

Return Value

Type: System..::.Double
The number x raised to the power y.

Remarks

The following table indicates the return value when various values or ranges of values are specified for the x and y parameters. For more information, see Double..::.PositiveInfinity, Double..::.NegativeInfinity, and Double..::.NaN.

Parameters	Return value
x or y = NaN.	NaN
x = Any value except NaN; y = 0.	1
x = NegativeInfinity; y < 0.	0
x = NegativeInfinity; y is a positive odd integer.	NegativeInfinity
x = NegativeInfinity; y is positive but not an odd integer.	PositiveInfinity
x < 0 but not NegativeInfinity; y is not an integer, NegativeInfinity, or PositiveInfinity.	NaN
x = -1; y = NegativeInfinity or PositiveInfinity.	NaN
-1 < x < 1; y = NegativeInfinity.	PositiveInfinity
-1 < x < 1; y = PositiveInfinity.	0
x < -1 or x > 1; y = NegativeInfinity.	0
x < -1 or x > 1; y = PositiveInfinity.	PositiveInfinity
x = 0; y < 0.	PositiveInfinity
x = 0; y > 0.	0
x = 1; y is any value except NaN.	1
x = PositiveInfinity; y < 0.	0
x = PositiveInfinity; y > 0.	PositiveInfinity

Examples

The following example uses the Pow method to calculate the value that results from raising 2 to a power ranging from 0 to 32.

Visual Basic

Public Module Example
   Public Sub Main
      Dim value As Integer = 2
      For power As Integer = 0 To 32
         Console.WriteLine("{0}^{1} = {2:N0} (0x{2:X})", _
                           value, power, CLng(Math.Pow(value, power)))
      Next
   End Sub
End Module
' The example displays the following output:
'       2^0 = 1 (0x1)
'       2^1 = 2 (0x2)
'       2^2 = 4 (0x4)
'       2^3 = 8 (0x8)
'       2^4 = 16 (0x10)
'       2^5 = 32 (0x20)
'       2^6 = 64 (0x40)
'       2^7 = 128 (0x80)
'       2^8 = 256 (0x100)
'       2^9 = 512 (0x200)
'       2^10 = 1,024 (0x400)
'       2^11 = 2,048 (0x800)
'       2^12 = 4,096 (0x1000)
'       2^13 = 8,192 (0x2000)
'       2^14 = 16,384 (0x4000)
'       2^15 = 32,768 (0x8000)
'       2^16 = 65,536 (0x10000)
'       2^17 = 131,072 (0x20000)
'       2^18 = 262,144 (0x40000)
'       2^19 = 524,288 (0x80000)
'       2^20 = 1,048,576 (0x100000)
'       2^21 = 2,097,152 (0x200000)
'       2^22 = 4,194,304 (0x400000)
'       2^23 = 8,388,608 (0x800000)
'       2^24 = 16,777,216 (0x1000000)
'       2^25 = 33,554,432 (0x2000000)
'       2^26 = 67,108,864 (0x4000000)
'       2^27 = 134,217,728 (0x8000000)
'       2^28 = 268,435,456 (0x10000000)
'       2^29 = 536,870,912 (0x20000000)
'       2^30 = 1,073,741,824 (0x40000000)
'       2^31 = 2,147,483,648 (0x80000000)
'       2^32 = 4,294,967,296 (0x100000000)

using System;

public class Example
{
   public static void Main()
   {
      int value = 2;
      for (int power = 0; power <= 32; power++)
         Console.WriteLine("{0}^{1} = {2:N0} (0x{2:X})", 
                           value, power, (long)Math.Pow(value, power));
   }
}
// The example displays the following output:
//       2^0 = 1 (0x1)
//       2^1 = 2 (0x2)
//       2^2 = 4 (0x4)
//       2^3 = 8 (0x8)
//       2^4 = 16 (0x10)
//       2^5 = 32 (0x20)
//       2^6 = 64 (0x40)
//       2^7 = 128 (0x80)
//       2^8 = 256 (0x100)
//       2^9 = 512 (0x200)
//       2^10 = 1,024 (0x400)
//       2^11 = 2,048 (0x800)
//       2^12 = 4,096 (0x1000)
//       2^13 = 8,192 (0x2000)
//       2^14 = 16,384 (0x4000)
//       2^15 = 32,768 (0x8000)
//       2^16 = 65,536 (0x10000)
//       2^17 = 131,072 (0x20000)
//       2^18 = 262,144 (0x40000)
//       2^19 = 524,288 (0x80000)
//       2^20 = 1,048,576 (0x100000)
//       2^21 = 2,097,152 (0x200000)
//       2^22 = 4,194,304 (0x400000)
//       2^23 = 8,388,608 (0x800000)
//       2^24 = 16,777,216 (0x1000000)
//       2^25 = 33,554,432 (0x2000000)
//       2^26 = 67,108,864 (0x4000000)
//       2^27 = 134,217,728 (0x8000000)
//       2^28 = 268,435,456 (0x10000000)
//       2^29 = 536,870,912 (0x20000000)
//       2^30 = 1,073,741,824 (0x40000000)
//       2^31 = 2,147,483,648 (0x80000000)
//       2^32 = 4,294,967,296 (0x100000000)

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Reference

Math Class

Math Members

System Namespace

Change History

Date	History	Reason
August 2009	Replaced the example.	Customer feedback.

Date

History

Reason

August 2009

Replaced the example.

Customer feedback.