cjdelphi:
with each iteration of the loop does a local variable get created (c/n) and recreated over and over again?
Yes. Automatic local variables are allocated on the stack and thrown away when the stack is unwound at the end of the call. In general, the more tightly you restrict the scope of the data the less chance there is for dependencies and unintended interactions between different parts of your code. This is why use of global data is best avoided where possible, and use of local data and arguments is generally preferred.