Bug? Variable defined as Long acts link Int

This code:

Generates this output.
Diff1 is:999999000
Diff2 is:1999998000
Diff3 is:-1294970296
Diff4 is:-2147483648

This is expected and normal behavior. In all 4 cases, you're doing operations on two Ints and then assigning the resulting value to a Long. Consequently, the Int overflow will occur before a Long is created and any values are stored in it.

Instead, try this:

This makes sure that 999999 is stored in a Long and that the resulting 999999*3000 is performed as Long multiplication and not Int multiplication.

Thank you, that does explain it in that the right hand side is evaluated first. I think making the temporary value that holds the Int * Int of the same type as the left hand side would be more intuitive. Don't mind the rules though as long as I know what they are.