how to get out infinite loop

this code required to calculate the smallest multiple with uint64 format bit gets stuck on argument 45. it only displays busy . can someone explain why?

function answer = smallest_multiple (N)
limit =1e15;
for i = N:N:limit

      for j = N:-1:1

      if mod(i,j) ~= 0

          break

      end

      end

      if j == 1 

           answer =uint64(i);

          break
      end 
   end

[Adam]

Why do you assume it is an infinite loop? It seems to just be very slow. Looping up to 1e15 isn't going to be especially fast.

[OLUBUKOLA ogunsola]

anything smaller than that comes back with the result ' output argument "answer" ( and maybe others) not assigned during call to "smallest_multiple" . but it doesn't do that with output argument up to 30. then it gives the error

[jgg]

You break out of your loop if i is not divisible by j at any point; this means answer is not assigned in many loop iterations. This is probably not what you want to do here.