Double.IsNaN Method (Double)

 
System_CAPS_noteNote

The .NET API Reference documentation has a new home. Visit the .NET API Browser on docs.microsoft.com to see the new experience.

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

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

static member IsNaN : 
        d:float -> bool

Parameters

d
Type: System.Double

A double-precision floating-point number.

Return Value

Type: System.Boolean

true if d evaluates to NaN; otherwise, false.

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

System_CAPS_noteNote

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

The following code example illustrates the use of IsNaN:

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top
Show: