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Mohammed Modi for LoginRadius

Posted on • Originally published at loginradius.com on

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Checking for NaN in JavaScript

What is NaN? NaN, in JavaScript, can be many things. In fact, it can be almost anything, so long as it is Not a Number. Its type is technical “number” (when evaluated with “typeof”), although it stands for Not a Number. What causes values to become NaN? Values can become NaN…

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