What's the best approach to check if in a array of lists a single list is empty after I used calloc?

Question

Usually, when I use linked lists, I write:

struct node *startPtr = NULL;

so I check later if is it NULL, and if it is, it means that the list is

Answer 1

You can try to assign nextPtr to the same element or you can introduce a special global item which will mean an empty list.