Main question: What is a NaN value or NaN exactly (in the words of a non-math professor)? Furthermore i have a few questions about the whole circumstance, which giving me complaints in understanding what a NaN should be, which are not necessary to answer my main question but desired: What are operations which causing a NaN value as result?
What is NaN (Not a Number) in the words of a beginner?
It actually makes sense, because "A" is actually not a number. But what we really want to check is if myVar is exactly of value NaN. So isNaN () cannot help. Then what should we do instead? In the light that NaN is the only JavaScript value that is treated unequal to itself, so we can check for its equality to itself using !==
I have a program that tries to shrink a double down to a desired number. The output I get is NaN. What does NaN mean in Java?
float('nan') represents NaN (not a number). But how do I check for it?
In numpy there are nan, NaN and NAN. What's the sense of having all three, do they differ or any of these can be used interchangeably?
I would like to know why some languages like R has both NA and NaN. What are the differences or are they equally the same? Is it really needed to have NA?
Tenía tiempo programando en JavaScript y nunca me había dado cuenta de esa peculiaridad que tiene con el valor NaN. Decidí investigar y lo más que encontré fue: NaN - JavaScript | MDN / [inglés].