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NaN Property (Global)

Visual Studio 2010

Returns the special value NaN indicating that an expression is not a number.

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NaN

The NaN property (not a number) is a member of the Global object, and is made available when the scripting engine is initialized.

NaN does not compare equal to any value, including itself. To test if a value is equivalent to NaN, use the isNaN method of the Global object.

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