The IAPs will initially get an IP from DHCP. They can be statically set after that if you want. These are the IPs assigned to the IAP itself. The virtual controller should have an IP assigned to it (statically). This way if the VC goes down and another picks up; it can assume the VC address. The image below shows an IP of 192.168.13.158 assigned to the IAP itself, but a staic IP of 192.168.13.225 for the virtual controller.
The first time you plug in IAPs, they'll advertise the "instant" SSID. If you connect and browse to any web page, you'll be redirected to the virtual controller web interface where you can see this IP info. You can then set a static IP for the virtual controller (and IAPs if desired).