I kind of get it when I reassigned a variable to a new value, the previous value will be erased.
But as I think deeper, I have found myself too ignorant to explain why. Reassignment makes sense to me subconsciously, could anyone explain to me how it works that way, or any additional reading I could read on my own?
Sorry, maybe the question is too stupid to ask. my apology.
Thank you for your explaination.