Can someone help me explain this looping logic ?

Can you explain more about this ?
i tried to change some :


this way, both true and false going to add into Spawned Actors array ( idk if it was false it would add which actor into array while it’s not have any actor spawn there ?? )

these way it’ll going to Add array node after first time flowing same like old way i posted


i tried doing this, it’ll drop loop body and going to Add node immediatly