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What does isNaN function do? When is it used?

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What does isNaN function do? When is it used?
posted Jun 5, 2014 by Khusboo

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1 Answer

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Best answer

NAN means not a number, it is used to check whether a value is number or not.

Example :
isNaN(123) -> it will return false.because it is a number
isNaN(12/3/2014)->it will return true.because it is not a number.

answer Jun 5, 2014 by Gowri Sankar
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