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Single.IsNaN(Single) Method

  • Reference

Definition

Namespace:
System
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
Single.cs
Source:
Single.cs
Source:
Single.cs

Returns a value that indicates whether the specified value is not a number (NaN).

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

Parameters

f
Single

A single-precision floating-point number.

Returns

Boolean

true if f evaluates to not a number (NaN); otherwise, false.

Implements

IsNaN(TSelf)

Examples

The following code example demonstrates the IsNaN method.

// This will return true.
if ( Single::IsNaN( 0 / zero ) )
{
   Console::WriteLine( "Single::IsNan() can determine whether a value is not-a-number." );
}

// This will return true.
if (Single.IsNaN(0 / zero))
{
    Console.WriteLine("Single.IsNan() can determine whether a value is not-a-number.");
}

// This will return true.
if Single.IsNaN(0f / zero) then
    printfn "Single.IsNan() can determine whether a value is not-a-number."

' This will return true.
If Single.IsNaN(0 / zero) Then
    Console.WriteLine("Single.IsNan() can determine whether a value is not-a-number.")
End If

Remarks

Floating-point operations return NaN to signal that result of the operation is undefined. For example, dividing 0.0 by 0.0 results in NaN.

Note

IsNaN returns false if a Single value is either PositiveInfinity or NegativeInfinity. To test for these values, use the IsInfinity, IsPositiveInfinity, and IsNegativeInfinity methods.

Applies to

See also