Google recently launched Android 4.3 update for the latest Nexus devices including 4, 7 and 10. After installation most import point is giving wings to your device, means rooting. Here is a guide to root your Android 4.3 nexus device.
Nexus 4, 7 or 10, or Galaxy Nexus running Android 4.3
ClockworkMod or TWRP recovery
SuperSU 1.50 by Chainfire
1.Download the SuperSU 1.50 zip file and copy it to your device.
2.Reboot your device go to recovery mode.
3.Install the SuperSU zip file from recovery. If you are using ClockworkMod, you’ll need to select “install zip from sdcard” > “choose zip from sdcard”, select the file and confirm the operation, while TWRP users will need to tap “Install”, then select the file and confirm.
4.Wipe cache and dalvik cache.
6.Reboot your device.
Disclaimer: Follow this guide at your own risk.