I have this simple app which asks input from a user and stored in an array. Now, for example I have stored an int value of "5" in array[2] in coreData. Now I want to add another element to the one that I have already in store. I have another number "6" to add in array[2] now the result would be array[2] = 11... How do I do it guys? I'm still new to swift... Thanks in advance!