# Single.IsInfinity(Single) Method

## Definition

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

``````public:
static bool IsInfinity(float f);``````
``````public:
static bool IsInfinity(float f) = System::Numerics::INumberBase<float>::IsInfinity;``````
``public static bool IsInfinity (float f);``
``static member IsInfinity : single -> bool``
``Public Shared Function IsInfinity (f As Single) As Boolean``

#### Parameters

f
Single

A single-precision floating-point number.

#### Returns

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

## Examples

The following code example demonstrates the IsInfinity method.

``````// This will return S"true".
Console::WriteLine( "IsInfinity(3.0F / 0) == {0}.", Single::IsInfinity( 3.0F / zero ) ? (String^)"true" : "false" );
``````
``````// This will return "true".
Console.WriteLine("IsInfinity(3.0F / 0) == {0}.", Single.IsInfinity(3.0F / 0) ? "true" : "false");
``````
``````// This will return "true".
printfn \$"IsInfinity(3.0F / 0) == %b{Single.IsInfinity(3f / 0f)}."
``````
``````' This will return "True".
Console.Write("IsInfinity(3.0 / 0) = ")
If Single.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.