Single.IsNaN(Single) Single.IsNaN(Single) Single.IsNaN(Single) Single.IsNaN(Single) Method

Definition

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);
static member IsNaN : single -> bool
Public Shared Function IsNaN (f As Single) As Boolean

Parameters

f
Single Single Single Single

A single-precision floating-point number.

Returns

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

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(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