Javascript float subtract

Question

I was wondering how can I subtract two negative Floating-Point numbers in javascript. I tried:

alert(-0.2-0.1);

and the result is -0.

Answer 1

Another possible solution might be this:

Number((-0.2-0.1).toFixed(x))

Where x should be the tolerance in decimals you'd like.

Running this with an x of 16, gives me an output of -0.3.

-0.3 === Number((-0.2-0.1).toFixed(16)) // true, and also with every 0 < x < 16

Let me know.