Double.IsNegativeInfinity(Double) メソッド

定義

名前空間:

System

アセンブリ:

System.Runtime.dll

ソース:

Double.cs

指定した数値が負の無限大と評価されるかどうかを示す値を返します。

public:
 static bool IsNegativeInfinity(double d) = System::Numerics::INumberBase<double>::IsNegativeInfinity;

public static bool IsNegativeInfinity (double d);

static member IsNegativeInfinity : double -> bool

Public Shared Function IsNegativeInfinity (d As Double) As Boolean

パラメーター

d

Double

倍精度浮動小数点数。

戻り値

Boolean

d が NegativeInfinity と評価される場合は true。それ以外の場合は false。

実装

IsNegativeInfinity(TSelf)

例

次のコード例は、 の使用方法 IsNegativeInfinityを示しています。

// This will return S"true".
Console::WriteLine( "IsNegativeInfinity(-5.0 / 0) == {0}.", Double::IsNegativeInfinity(  -5.0 / zero ) ? (String^)"true" : "false" );

// This will return "true".
Console.WriteLine("IsNegativeInfinity(-5.0 / 0) == {0}.", Double.IsNegativeInfinity(-5.0 / 0) ? "true" : "false");

// This will return "true".
printfn $"IsNegativeInfinity(-5.0 / 0) = {Double.IsNegativeInfinity(-5. / 0.)}."

' This will return "True".
Console.Write("IsNegativeInfinity(-5.0 / 0) = ")
If Double.IsNegativeInfinity(-5 / 0) Then
    Console.WriteLine("True.")
Else
    Console.WriteLine("False.")
End If

if ( d > Double::MaxValue )
{
   Console::WriteLine( "Your number is bigger than a double." );
}

if (d > Double.MaxValue)
   Console.WriteLine("Your number is bigger than a double.");

if d > Double.MaxValue then
   printfn $"Your number is bigger than a double."

If D > Double.MaxValue Then
    Console.WriteLine("Your number is bigger than a double.")
End If

// This will equal Infinity.
Console::WriteLine( "10.0 minus NegativeInfinity equals {0}.", (10.0 - Double::NegativeInfinity) );

// This will equal Infinity.
Console.WriteLine("10.0 minus NegativeInfinity equals {0}.", (10.0 - Double.NegativeInfinity).ToString());

// This will equal Infinity.
printfn $"10.0 minus NegativeInfinity equals {10.0 - Double.NegativeInfinity}."

' This will equal Infinity.
Console.WriteLine("10.0 minus NegativeInfinity equals " + (10 - Double.NegativeInfinity).ToString() + ".")

注釈

浮動小数点演算は、オーバーフロー条件を通知するために戻ります NegativeInfinity 。

こちらもご覧ください

• IsInfinity(Double)
• IsPositiveInfinity(Double)
• PositiveInfinity
• NegativeInfinity