Samsung galaxy s2 rooting

I wonder if i tr to root the phone will i lose all data???? i cant seem to find an answer on this question on xda forums. allso how do i backup data without root so if anything goes wrong i can still restore everything?? titanium backup only works with root :S
Answer #1
Rooting will make no changes to your phone..The only changes is to give you full control over your system; Ability to alter system
files.