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Microsoft® JScript™
NaN Property
 Language Reference 
Version 2 

See Also                  Applies To

A special value that indicates an arithmetic expression returned a value that was not a number.

The number argument is the Number object.

The Number object does not have to be created before the NaN property can be accessed.

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

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