Double.MaxValue 欄位

定義

表示 Double 最大的可能值。Represents the largest possible value of a Double. 這個欄位是常數。This field is constant.

public: double MaxValue = 1.79769313486232E+308;
public const double MaxValue = 1.79769313486232E+308;
val mutable MaxValue : double
Public Const MaxValue As Double  = 1.79769313486232E+308

欄位值

範例

下列程式碼範例說明如何使用 Double.MaxValueThe following code example illustrates the use of Double.MaxValue:

public ref class Temperature
{
public:
   static property double MinValue 
   {
      double get()
      {
         return Double::MinValue;
      }
   }

   static property double MaxValue 
   {
      double get()
      {
         return Double::MaxValue;
      }
   }

protected:
   // The value holder
   double m_value;

public:
   property double Value 
   {
      double get()
      {
         return m_value;
      }
      void set( double value )
      {
         m_value = value;
      }
   }

   property double Celsius 
   {
      double get()
      {
         return (m_value - 32.0) / 1.8;
      }
      void set( double value )
      {
         m_value = 1.8 * value + 32.0;
      }
   }
};
public class Temperature {
    public static double MinValue {
        get {
            return Double.MinValue;
        }
    }

    public static double MaxValue {
        get {
            return Double.MaxValue;
        }
    }

    // The value holder
    protected double m_value;

    public double Value {
        get {
            return m_value;
        }
        set {
            m_value = value;
        }
    }

    public double Celsius {
        get {
            return (m_value-32.0)/1.8;
        }
        set {
            m_value = 1.8*value+32.0;
        }
    }
}
Public Class Temperature

    Public Shared ReadOnly Property MinValue() As Double
        Get
            Return Double.MinValue
        End Get
    End Property

    Public Shared ReadOnly Property MaxValue() As Double
        Get
            Return Double.MaxValue
        End Get
    End Property

    ' The value holder
    Protected m_value As Double

    Public Property Value() As Double
        Get
            Return m_value
        End Get
        Set(ByVal Value As Double)
            m_value = Value
        End Set
    End Property

    Public Property Celsius() As Double
        Get
            Return (m_value - 32) / 1.8
        End Get
        Set(ByVal Value As Double)
            m_value = Value * 1.8 + 32
        End Set
    End Property
End Class

備註

這個常數的值是正數 1.7976931348623157 E + 308。The value of this constant is positive 1.7976931348623157E+308.

Double.PositiveInfinity超出 Double.MaxValue 的作業結果。The result of an operation that exceeds Double.MaxValue is Double.PositiveInfinity. 在下列範例中,當結果超出 Double.MaxValue時,Double.PositiveInfinity 加、乘和乘冪運算的結果。In the following example, Double.PositiveInfinity results from addition, multiplication, and exponentiation operations when the result exceeds Double.MaxValue.

using System;

public class Example
{
   public static void Main()
   {
      double result1 = 7.997e307 + 9.985e307;
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result1, Double.IsPositiveInfinity(result1));
      
      double result2 = 1.5935e250 * 7.948e110;
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result2, Double.IsPositiveInfinity(result2));
      
      double result3 = Math.Pow(1.256e100, 1.34e20);
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result3, Double.IsPositiveInfinity(result3));
   }
}
// The example displays the following output:
//    Infinity (Positive Infinity: True)
//    Infinity (Positive Infinity: True)
//    Infinity (Positive Infinity: True)
Module Example
   Public Sub Main()
      Dim result1 As Double = 7.997e307 + 9.985e307
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result1, Double.IsPositiveInfinity(result1))
      
      Dim result2 As Double = 1.5935e250 * 7.948e110
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result2, Double.IsPositiveInfinity(result2))
      
      Dim result3 As Double = Math.Pow(1.256e100, 1.34e20)
      Console.WriteLine("{0} (Positive Infinity: {1})", 
                        result3, Double.IsPositiveInfinity(result3))
   End Sub
End Module
' The example displays the following output:
'    Infinity (Positive Infinity: True)
'    Infinity (Positive Infinity: True)
'    Infinity (Positive Infinity: True)

適用於