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Double.IsInfinity Method

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

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

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

returnValue = Double.IsInfinity(d)

Parameters

d
Type: System.Double

A double-precision floating-point number.

Return Value

Type: System.Boolean
true if d evaluates to PositiveInfinity or NegativeInfinity; otherwise, false.

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

The following code example illustrates the use of IsInfinity:

' This will return "True".
Console.Write("IsInfinity(3.0 / 0) = ")
If Double.IsPositiveInfinity(3 / 0) Then
    Console.WriteLine("True.")
Else
    Console.WriteLine("False.")
End If

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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