Double.IsInfinity(Double) Method

Definition

Namespace:: System

Assemblies:: System.Runtime.dll, mscorlib.dll, netstandard.dll

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

public:
 static bool IsInfinity(double d);

public static bool IsInfinity (double d);

static member IsInfinity : double -> bool

Public Shared Function IsInfinity (d As Double) As Boolean

Parameters

d: Double

A double-precision floating-point number.

Returns

Boolean

true if d evaluates to PositiveInfinity or NegativeInfinity; otherwise, false.

Examples

The following code example illustrates the use of IsInfinity:

// This will return S"true".
Console::WriteLine( "IsInfinity(3.0 / 0) == {0}.", Double::IsInfinity( 3.0 / zero ) ? (String^)"true" : "false" );

// This will return "true".
Console.WriteLine("IsInfinity(3.0 / 0) == {0}.", Double.IsInfinity(3.0 / 0) ? "true" : "false");

' 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

Remarks

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