What is NaN in java??

Answer 1

Not a Number
See https://stackoverflow.com/q/2618059

Answer 2

Not a number
The NaN property represents "Not-a-Number" value. This property indicates that a value is not a legal number. The NaN property is the same as the Number.Nan property. Tip: Use the isNaN() global function to check if a value is a NaNvalue.
Src W3schools

Answer 3

Not_A_Number.

It's on Java+ JavaScript

Answer 4

Not a number; applied to numeric values that represent an undefined or unrepresentable value, such as zero divided by itself.

Answer 5

Nan stands for "not a number".

Answer 6

IsNaN = is Not a number, is very useful to compare different values, if the value is a number it will return TRUE but if it's not it will take the value of FALSE