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Double.IsNaN Method

Returns a value indicating whether the specified number evaluates to a value that 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.

The following code example illustrates the use of IsNaN:

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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