Scope, memory usage and goto

[Erendar]

            Start:
            {
                int i = 0;
                i++;
                goto Start;
            }

My teacher told me never to use goto statements, trying to figure if there's another reason apart making the code less reable

Was wondering if this would cause an infinite memory usage because of redeclaring a variable each "loop" ? Or will the garbage collector empties the memory once we go out of scope ?

If the second is yes then what about that

            {
                Start:
                int i = 0;
                i++;
                goto Start;
            }

This one should use a lot of memory, no ?