c: printf("%-16llu", my_var);

Question

It's been awhile since I've played with c, and now I find something I've never seen before:

printf("%-16llu", my_var);

It would seem to be saying print 16 characters of a long unsigned int. But, what's the second 'l' for? long long?

Answer 1

%llu

Is for unsigned long long. This was added in C99 (and much, much after K&R wrote the book).