Math.Pow(Double, Double) Math.Pow(Double, Double) Math.Pow(Double, Double) Math.Pow(Double, Double) Method

定義

指定の数値を指定した値で累乗した値を返します。 Returns a specified number raised to the specified power.

public:
 static double Pow(double x, double y);
public static double Pow (double x, double y);
static member Pow : double * double -> double
Public Shared Function Pow (x As Double, y As Double) As Double
パラメーター
x
Double Double Double Double

累乗対象の倍精度浮動小数点数。 A double-precision floating-point number to be raised to a power.

y
Double Double Double Double

累乗を指定する倍精度浮動小数点数。 A double-precision floating-point number that specifies a power.

戻り値

数値 xy で累乗した値。 The number x raised to the power y.

次の例では、 Pow 2 0 から 32 まで電源を発生させるから結果値を計算するメソッド。The following example uses the Pow method to calculate the value that results from raising 2 to a power ranging from 0 to 32.

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)
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)

注釈

さまざまな値または範囲の値を指定する、次の表は、戻り値を示します、xyパラメーター。The following table indicates the return value when various values or ranges of values are specified for the x and y parameters. 詳細については、「Double.PositiveInfinityDouble.NegativeInfinityおよび「Double.NaN」を参照してください。For more information, see Double.PositiveInfinity, Double.NegativeInfinity, and Double.NaN.

パラメーターParameters 戻り値Return value
x またはy = NaNします。x or y = NaN. NaN
x = すべての値を除くNaN;y = 0。x = Any value except NaN; y = 0. 11
x = NegativeInfinity; y < 0.x = NegativeInfinity; y < 0. 00
x = NegativeInfinity;yが奇数の正の整数。x = NegativeInfinity; y is a positive odd integer. NegativeInfinity
x = NegativeInfinity;yは正の値が奇数の整数ではありません。x = NegativeInfinity; y is positive but not an odd integer. PositiveInfinity
x < 0 なくNegativeInfinity;y 、整数ではないNegativeInfinity、またはPositiveInfinityします。x < 0 but not NegativeInfinity; y is not an integer, NegativeInfinity, or PositiveInfinity. NaN
x =-1。y = NegativeInfinityまたはPositiveInfinityします。x = -1; y = NegativeInfinity or PositiveInfinity. NaN
-1 < x < 1 になります。y = NegativeInfinity.-1 < x < 1; y = NegativeInfinity. PositiveInfinity
-1 < x < 1 になります。y = PositiveInfinity.-1 < x < 1; y = PositiveInfinity. 00
x <-1 またはx> 1 になります;y = NegativeInfinity.x < -1 or x > 1; y = NegativeInfinity. 00
x <-1 またはx> 1 になります;y = PositiveInfinity.x < -1 or x > 1; y = PositiveInfinity. PositiveInfinity
x = 0; y < 0.x = 0; y < 0. PositiveInfinity
x = 0; y > 0.x = 0; y > 0. 00
x = 1 になります。y以外の値は、NaNします。x = 1; y is any value except NaN. 11
x = PositiveInfinity; y < 0.x = PositiveInfinity; y < 0. 00
x = PositiveInfinity;y > 0。x = PositiveInfinity; y > 0. PositiveInfinity

適用対象

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