elow is a recursive function definition. For what range of input will this function $($eventually$)$ terminate successfully?

def num$\_$to$\_$as$($num$)$:

$\text{'}\text{'}\text{'}$

Do we know this will end?

$\text{'}\text{'}\text{'}$

if num $==0$:

return $""$

return $"$a$"+$ num$\_$to$\_$as$($num $-1)$

Any number

Any integer

Any negative integer or zero

Any positive integer or zero