When you know how many times you need to run some code then FOR loop is best. For example, array-dictionary traversal Whereas, WHILE loop is best when you don't know how many times some code will run. For example, in a LinkedList traversal, we don't know how many nodes are there in the linked list. We will go through each node until it becomes nil. Note: In many cases, you can use them vice-versa.

You can enable a multi-select option in table view. tableView.allowsMultipleSelectionDuringEditing = true This allows you to select multiple rows with a checkbox.