# Double.IsNegativeInfinity(Double) Method

## Definition

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

public:
static bool IsNegativeInfinity(double d);
public:
static bool IsNegativeInfinity(double d) = System::Numerics::INumberBase<double>::IsNegativeInfinity;
public static bool IsNegativeInfinity (double d);
static member IsNegativeInfinity : double -> bool
Public Shared Function IsNegativeInfinity (d As Double) As Boolean

#### Parameters

d
Double

A double-precision floating-point number.

#### Returns

true if d evaluates to NegativeInfinity; otherwise, false.

## Examples

The following code example illustrates the use of IsNegativeInfinity:

// This will return S"true".
Console::WriteLine( "IsNegativeInfinity(-5.0 / 0) == {0}.", Double::IsNegativeInfinity(  -5.0 / zero ) ? (String^)"true" : "false" );

// This will return "true".
Console.WriteLine("IsNegativeInfinity(-5.0 / 0) == {0}.", Double.IsNegativeInfinity(-5.0 / 0) ? "true" : "false");

// This will return "true".
printfn $"IsNegativeInfinity(-5.0 / 0) = {Double.IsNegativeInfinity(-5. / 0.)}."  ' This will return "True". Console.Write("IsNegativeInfinity(-5.0 / 0) = ") If Double.IsNegativeInfinity(-5 / 0) Then Console.WriteLine("True.") Else Console.WriteLine("False.") End If  if ( d > Double::MaxValue ) { Console::WriteLine( "Your number is bigger than a double." ); }  if (d > Double.MaxValue) Console.WriteLine("Your number is bigger than a double.");  if d > Double.MaxValue then printfn$"Your number is bigger than a double."

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 {0}.", (10.0 - Double::NegativeInfinity) );

// This will equal Infinity.
Console.WriteLine("10.0 minus NegativeInfinity equals {0}.", (10.0 - Double.NegativeInfinity).ToString());

// This will equal Infinity.
printfn \$"10.0 minus NegativeInfinity equals {10.0 - Double.NegativeInfinity}."

' This will equal Infinity.
Console.WriteLine("10.0 minus NegativeInfinity equals " + (10 - Double.NegativeInfinity).ToString() + ".")


## Remarks

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