That's one thing that really bugs me about Javascript (weirdly enough I'm okay with eg prototypal inheritance and how this works, or at least worked before the bolted on classes that were added because apparently I'm like one of the dozen or so people who had no problems with those concepts). The fact that all numbers are floats can lead to a lot of fun and exciting bugs that people might not even realize are there until they suddenly get a weird decimal where they expected an integer