<|im_start|>user
What is the use of isNaN function?<|im_end|>
<|im_start|>assistant
The `isNaN` function in JavaScript returns `true` if the value passed is not a number and `false` if the value is a number. 

It's important to note that, due to JavaScript's nature, many values may be coerced into being numbers unexpectedly. Because of that, using the `Number.isNaN` is recommended.<|im_end|>
<|im_start|>user
This sounds good<|im_end|>
<|im_start|>assistant
You're welcome! Is there anything else I can help you with today?<|im_end|>
