solid answer

Use the strict equality === otherwise it will create errors or bugs when there is a huge code base

i'll try do my best

no need for else, u can put just return "Odd"

IMHO. Code Style is not good

I belive most sane c/c++ compilers optimize any multiplication/divison by powers of two into bit shifts, which is even faster than addition

Addition runs faster than multiplication

Just put in your code console.log(message) where message is text or an object of some kind.

How do you do a console.log? I can't seem to figure it out

There are 4 hard-coded tests, and then 100 randomly-generated tests; are you talking about that second set? The same rules apply to all the tests, of course. So if you want, you could console.log out the input, and your output, and then look at the ones that don't pass and figure out what the problem is.

I ran into the same problem too with Java. I was not able to get satisfactory results by rounding. The expected values of the random tests remained off by one.