Math.Sign メソッド

2008-03-28

数値の符号を示す値を返します。

オーバーロードの一覧

10 進数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Decimal) As Integer

[C#] public static int Sign(decimal);

[C++] public: static int Sign(Decimal);

[JScript] public static function Sign(Decimal) : int;

倍精度浮動小数点数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Double) As Integer

[C#] public static int Sign(double);

[C++] public: static int Sign(double);

[JScript] public static function Sign(double) : int;

16 ビット符号付き整数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Short) As Integer

[C#] public static int Sign(short);

[C++] public: static int Sign(short);

[JScript] public static function Sign(Int16) : int;

32 ビット符号付き整数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Integer) As Integer

[C#] public static int Sign(int);

[C++] public: static int Sign(int);

[JScript] public static function Sign(int) : int;

64 ビット符号付き整数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Long) As Integer

[C#] public static int Sign(long);

[C++] public: static int Sign(__int64);

[JScript] public static function Sign(long) : int;

8 ビット符号付き整数の符号を示す値を返します。このメソッドは、CLS と互換性がありません。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(SByte) As Integer

[C#] public static int Sign(sbyte);

[C++] public: static int Sign(char);

[JScript] public static function Sign(SByte) : int;

単精度浮動小数点数の符号を示す値を返します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Shared Function Sign(Single) As Integer

[C#] public static int Sign(float);

[C++] public: static int Sign(float);

[JScript] public static function Sign(float) : int;

使用例

[Visual Basic, C#, C++] メモここでは、Sign のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。

 
' This example demonstrates Math.Sign()
Imports System

Class Sample
   Public Shared Sub Main()
      Dim str As String = "{0}: {1,3} is {2} zero."
      Dim nl As String = Environment.NewLine
      
      Dim xByte1 As Byte = 0
      Dim xShort1 As Short = -2
      Dim xInt1 As Integer = -3
      Dim xLong1 As Long = -4
      Dim xSingle1 As Single = 0F
      Dim xDouble1 As Double = 6.0
      Dim xDecimal1 As [Decimal] = -7D
      ' The following type is not CLS-compliant: SByte
      
      Console.WriteLine("{0}Test the sign of the following types of values:", nl)
      Console.WriteLine(str, "Byte   ", xByte1, Test(Math.Sign(xByte1)))
      Console.WriteLine(str, "Int16  ", xShort1, Test(Math.Sign(xShort1)))
      Console.WriteLine(str, "Int32  ", xInt1, Test(Math.Sign(xInt1)))
      Console.WriteLine(str, "Int64  ", xLong1, Test(Math.Sign(xLong1)))
      Console.WriteLine(str, "Single ", xSingle1, Test(Math.Sign(xSingle1)))
      Console.WriteLine(str, "Double ", xDouble1, Test(Math.Sign(xDouble1)))
      Console.WriteLine(str, "Decimal", xDecimal1, Test(Math.Sign(xDecimal1)))
      '
      Console.WriteLine("{0}The following type is not supported: SByte", nl)
   End Sub 'Main
   '
   Public Shared Function Test([compare] As Integer) As [String]
      If [compare] = 0 Then
         Return "equal to"
      ElseIf [compare] < 0 Then
         Return "less than"
      Else
         Return "greater than"
      End If
   End Function 'Test
End Class 'Sample 
'
'This example produces the following results:
'
'Test the sign of the following types of values:
'Byte   :   0 is equal to zero.
'Int16  :  -2 is less than zero.
'Int32  :  -3 is less than zero.
'Int64  :  -4 is less than zero.
'Single :   0 is equal to zero.
'Double :   6 is greater than zero.
'Decimal:  -7 is less than zero.
'
'The following type is not supported: SByte
'

[C#] 
// This example demonstrates Math.Sign()
using System;

class Sample 
{
    public static void Main() 
    {
    string str = "{0}: {1,3} is {2} zero.";
    string nl = Environment.NewLine;

    byte     xByte1    = 0;    
    short    xShort1   = -2;
    int      xInt1     = -3;
    long     xLong1    = -4;
    float    xSingle1  = 0.0f;
    double   xDouble1  = 6.0;
    Decimal  xDecimal1 = -7m;

// The following type is not CLS-compliant.
    sbyte    xSbyte1   = -101;

    Console.WriteLine("{0}Test the sign of the following types of values:", nl);
    Console.WriteLine(str, "Byte   ", xByte1, Test(Math.Sign(xByte1)));
    Console.WriteLine(str, "Int16  ", xShort1, Test(Math.Sign(xShort1)));
    Console.WriteLine(str, "Int32  ", xInt1, Test(Math.Sign(xInt1)));
    Console.WriteLine(str, "Int64  ", xLong1, Test(Math.Sign(xLong1)));
    Console.WriteLine(str, "Single ", xSingle1, Test(Math.Sign(xSingle1)));
    Console.WriteLine(str, "Double ", xDouble1, Test(Math.Sign(xDouble1)));
    Console.WriteLine(str, "Decimal", xDecimal1, Test(Math.Sign(xDecimal1)));
//
    Console.WriteLine("{0}The following type is not CLS-compliant.", nl);
    Console.WriteLine(str, "SByte  ", xSbyte1, Test(Math.Sign(xSbyte1)));
    }
//
    public static String Test(int compare)
    {
    if (compare == 0) 
       return "equal to";
    else if (compare < 0)  
        return "less than";
    else 
        return "greater than";
    }
}
/*
This example produces the following results:

Test the sign of the following types of values:
Byte   :   0 is equal to zero.
Int16  :  -2 is less than zero.
Int32  :  -3 is less than zero.
Int64  :  -4 is less than zero.
Single :   0 is equal to zero.
Double :   6 is greater than zero.
Decimal:  -7 is less than zero.

The following type is not CLS-compliant.
SByte  : -101 is less than zero.
*/

[C++] 
// This example demonstrates Math.Sign()
#using <mscorlib.dll>
using namespace System;

String* Test(int compare)
{
    if (compare == 0) 
       return S"equal to";
    else if (compare < 0)  
        return S"less than";
    else 
        return S"greater than";
}

int main() 
{
    String* str = S"{0}: {1,3} is {2} zero.";
    String* nl = Environment::NewLine;

    Byte     xByte1    = 0;    
    short    xShort1   = -2;
    int      xInt1     = -3;
    long     xLong1    = -4;
    float    xSingle1  = 0.0f;
    double   xDouble1  = 6.0;
    Decimal  xDecimal1 = -7;

// The following type is not CLS-compliant.
    SByte    xSbyte1   = -101;

    Console::WriteLine(S"{0}Test the sign of the following types of values:", nl);
    Console::WriteLine(str, S"Byte   ", __box(xByte1), Test(Math::Sign(xByte1)));
    Console::WriteLine(str, S"Int16  ", __box(xShort1), Test(Math::Sign(xShort1)));
    Console::WriteLine(str, S"Int32  ", __box(xInt1), Test(Math::Sign(xInt1)));
    Console::WriteLine(str, S"Int64  ", __box(xLong1), Test(Math::Sign(xLong1)));
    Console::WriteLine(str, S"Single ", __box(xSingle1), Test(Math::Sign(xSingle1)));
    Console::WriteLine(str, S"Double ", __box(xDouble1), Test(Math::Sign(xDouble1)));
    Console::WriteLine(str, S"Decimal", __box(xDecimal1), Test(Math::Sign(xDecimal1)));
//
    Console::WriteLine(S"{0}The following type is not CLS-compliant.", nl);
    Console::WriteLine(str, S"SByte  ", __box(xSbyte1), Test(Math::Sign(xSbyte1)));
}
/*
This example produces the following results:

Test the sign of the following types of values:
Byte   :   0 is equal to zero.
Int16  :  -2 is less than zero.
Int32  :  -3 is less than zero.
Int64  :  -4 is less than zero.
Single :   0 is equal to zero.
Double :   6 is greater than zero.
Decimal:  -7 is less than zero.

The following type is not CLS-compliant.
SByte  : -101 is less than zero.
*/

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

参照

Math クラス | Math メンバ | System 名前空間

次の方法で共有

Math.Sign メソッド

オーバーロードの一覧

使用例

参照

その他のリソース