@adamgfraser in the betweenWith definitions, isn't difference suppose to be always greater than zero given the condition above?

@luis3m We need it to deal with overflow. For example, say max is Int.MaxValue and min is -10. max is greater than min in that case, but if we do max - min we get -2147483639.

Conceptually the problem is that nextInt(n: Int) can only generate a space of integers up to Int.MaxValue. But the total space of integers is up to ~2X that. So if the space of integers that the caller is requesting is larger than that we need to fall back on the normal nextInt method and then retry until we get a value in range (which on average should only take two times).