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Double.IsInfinity(Double) Method

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Definition

Namespace:
System
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
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) = System::Numerics::INumberBase<double>::IsInfinity;
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.

Implements

IsInfinity(TSelf)

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".
printfn $"IsInfinity(3.0 / 0) = %b{Double.IsInfinity(3. / 0.)}."

' 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.

Applies to

See also