as far as I could remember Iterations are running same test with efferent parameters...pl correct me if wrong.
In TC we don't have out of box Iterations in which TC terms... DDT+test-items.
But It could be easily achieved using either parameterizing Test items
or just using DDT drive or combination of both.
as tristaanogre say if you explain what you need to achieve we can help with most simplest solution.
I do not know of a direct equivalent in TestComplete for the testiteration count. Perhaps you can describe how testiteration is used in UFT and we can discuss potential equivalent processes/procedures that you can do to get a similar value.
