NaN

[Charlie Swanson]

Why is Float.NaN == Float.NaN equal to false?
I don't understand the think behind not being able to check if NaN is not equal to NaN.

[William Brogden]

The special value NaN gets special treatment in all float related operations to ensure that your code does not lose track of the fact that a bad numeric operation occurred.
Use the static Float.isNaN( float ) method to detect NaN values.
Note there is also a NaN for double.
Bill

[Charlie Swanson]

The reason I am confused about this is isn't
Float.NaN or Double.NaN simply a constant of some sort.

[Ravindra Mohan]

Hi William,
I agree with you, a careless programmer can make such a mistake
while coding / debugging hence such a provision is provided in
situations wherein one needs to find out whether a NaN value
is occured during a programme.

Use the static Float.isNaN( float ) method to detect NaN values.

Ravindra Mohan.