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kotlinlang

Hello,
how to manage variable datatype
var aa=0 and var aa=0.0
?
with out A*ny*  key used?

This is Kotlin, not JavaScript.
A variable always has the same type, either specified explicitly or implicitly by type inference.

Not sure what you are trying to do, but maybe you are looking for this:
```var number: Number = 0
check(number is Int)
number = 0.0
check(number is Double)```


Another option is using an `Either` type to encapsulate a variable that could be an Int or a Double. Arrow has one (<https://arrow-kt.io/docs/apidocs/arrow-core-data/arrow.core/-either/>) but it’s probably easier to just write your own `Either` sealed class rather than bringing in all of Arrow just for this