Ending Digits of a Number

Write a function end$\_$digits $($num$,$ ndigits$)$ that returns the last ndigits digits of a non$-$negative integer num. Use the $\%$ operator. Assume that ndigits is a positive integer.

Examples:

end$\_$digits $(2468,3)$ returns $468,$ an int $.$

end$\_$digits $(2468,5)$ returns $2468,$ an int.