C＃のDouble.IsNegativeInfinity（）メソッド

C＃のDouble.IsNegativeInfinity（）メソッドは、指定された数値が負の無限大に評価されるかどうかを示す値を返すために使用されます。

構文

構文は次のとおりです-

public static bool IsNegativeInfinity (double val);

上記のvalは、倍精度浮動小数点数です。

例

例を見てみましょう-

using System;
public class Demo {
   public static void Main(){
      double d = 0.0/0;
      Console.WriteLine("Double Value = "+d);
      Console.WriteLine("HashCode of Double Value = "+d.GetHashCode());
      TypeCode type = d.GetTypeCode();
      Console.WriteLine("TypeCode of Double Value = "+type);
      Console.WriteLine("Positive Infinity? = "+Double.IsInfinity(d));
      Console.WriteLine("Check whether the specified value is NaN? = "+Double.IsNaN(d));
      Console.WriteLine("Does the value evaluate to negative infinity? = "+Double.IsNegativeInfinity(d));
   }
}

出力

これにより、次の出力が生成されます-

Double Value = NaN
HashCode of Double Value = -524288
TypeCode of Double Value = Double
Positive Infinity? = False
Check whether the specified value is NaN? = True
Does the value evaluate to negative infinity? = False

例

別の例を見てみましょう-

using System;
public class Demo {
   public static void Main(){
      double d = -1.0/0.0;
      Console.WriteLine("Double Value = "+d);
      Console.WriteLine("HashCode of Double Value = "+d.GetHashCode());
      TypeCode type = d.GetTypeCode();
      Console.WriteLine("TypeCode of Double Value = "+type);
      Console.WriteLine("Positive Infinity? = "+Double.IsInfinity(d));
      Console.WriteLine("Check whether the specified value is NaN? = "+Double.IsNaN(d));
      Console.WriteLine("Does the value evaluate to negative infinity? = "+Double.IsNegativeInfinity(d));
   }
}

出力

これにより、次の出力が生成されます-

Double Value = -∞
HashCode of Double Value = -1048576
TypeCode of Double Value = Double
Positive Infinity? = True
Check whether the specified value is NaN? = False
Does the value evaluate to negative infinity? = True