Actually, your first code snippet will not cause a memory leak because it is not jumping out of a loop or conditional with a Goto statement. A memory leak occurs when you jump out of a loop or conditional and do not jump back:
Repeat 0
If getKey
Goto A
End
Lbl A
...
This could be changed to avoid a the leak and improve efficiency:
This type of structure is commonly used when waiting for a keypress from the user:
Repeat Ans
getKey→K
End
Disp K
This code waits until the user presses any key and then displays the getKey value for that key. Since the Repeat loop tests the condition at the end of each iteration, we do not need to initialize Ans to 0 before entering the Repeat loop.