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Double.IsNegativeInfinity Method

Returns a value indicating whether the specified number evaluates to negative infinity.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

'Declaration
Public Shared Function IsNegativeInfinity ( _
	d As Double _
) As Boolean
'Usage
Dim d As Double
Dim returnValue As Boolean

returnValue = Double.IsNegativeInfinity(d)
public static boolean IsNegativeInfinity (
	double d
)
public static function IsNegativeInfinity (
	d : double
) : boolean

Parameters

d

A double-precision floating-point number.

Return Value

true if d evaluates to NegativeInfinity; otherwise, false.

Floating-point operations return NegativeInfinity to signal an overflow condition.

The following code example illustrates the use of IsNegativeInfinity:

            ' 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 Then
                Console.WriteLine("Your number is bigger than a double.")
            End If
...            ' This will equal Infinity.
            Console.WriteLine("10.0 minus NegativeInfinity equals " + (10 - Double.NegativeInfinity).ToString() + ".")

        // This will return "true".
        Console.WriteLine("IsNegativeInfinity(-5.0 / 0) == {0}.", 
            (System.Double.IsNegativeInfinity((-5.0 / 0))) ? "true" : "false");
...        if (d.doubleValue() > Double.MAX_VALUE) {
            Console.WriteLine("Your number is bigger than a double.");
        }
...        // This will equal Infinity.
        Console.WriteLine("10.0 minus NegativeInfinity equals {0}.",
            System.Convert.ToString(10.0 - System.Double.NegativeInfinity));

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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