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kotlinlang

I'm wondering what data type to use when working with low level UI Float or Double?

• iOS - Double
• Android - Float or Integer
• JS (browser) - I have no idea but as I remember Double is boxed in Kotlin/JS. On top of that Path2D in browsers uses Double
As of know I use Float in my code and convert it to the appropriate data type when I call platform dependent code. Is this a good idea or should I switch to Double?

Long is boxed. Double matches JS's native number type.

Float is usually good enough - you shouldn't notice the difference in precision in the UI
Double is also fine - it's mostly not slower than Float and the only downside is taking more memory

for the most part I'd just go with whatever's more convenient for the API you're working with

also it's not even a real choice on JS, Float is secretly a JS Number, same as Double.
```val x = 1f
val y = 1.0000000000000002
println(x == y.toFloat())```
is `true` on Kotlin/JVM, `false` in Kotlin/JS

Thanks, I'll switch to double then, it seems better.