Javascript Tutorial in Hindi - 43 NaN and isNaN Method in JavaScript
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In javascript special keyword is available i.e. NaN ( Not-a-Number ) is a special value in javascript which represents that a value is not a perfect number.
To identify whether the value is a legal number or not javascript has a special method i.e isNaN().
the isNaN() method will return true if the given value is string else it will represent false. it takes 1 parameter.
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