SO…
When I try to add/subtract 2 decimals

((0.7) + (0.2))

You think that the answer would be 0.9, but for some reason it just ends up being a very long string of decimals (in this case being 0.899999…)
And it doesn't only just happen in the editor, but in the project aswell.
This is a problem for clone-based counters like the one I'm using, so please fix this bug or give me some workarounds.

This is some sort of JavaScript float bug I believe. The only way to fix this is using the round operator unless you're using the decimals.

british_rod wrote:

Choppead wrote:

snip

((((0.7) + (0.2)) * (10)) / (10))

It's actually

(round (((0.7) + (0.2)) * (10))) / (10)

EDawg2011 wrote:

It's actually

(round (((0.7) + (0.2)) * (10))) / (10)

That returns 1… Not 0.9. To get 0.9, you need to remove the multiply and divide operators.
Edit: Javascript floats are very finicky and it returns 1 no matter what. Closest result is without the round block…

Knightbot63 wrote:

EDawg2011 wrote:

It's actually

(round (((0.7) + (0.2)) * (10))) / (10)

That returns 1… Not 0.9. To get 0.9, you need to remove the multiply and divide operators.
Edit: Javascript floats are very finicky and it returns 1 no matter what. Closest result is without the round block…

I can't replicate, did you multiply by 10 inside the round?

Knightbot63 wrote:

This is some sort of JavaScript float bug I believe.

That's right, it's because numbers are represented in binary.

Here's a more in-depth explanation. Computers currently use the binary number system to represent numbers. This is pretty easy to do with whole numbers:


However, with numbers with decimals, it might not be possible to represent them in a way that doesn't repeat in binary. Because computers have a limited amount of memory, they have to make an approximation.


Usually, the approximation is close to what the actual number is, but it usually won't be perfect.

Probably some java bug