Ipad air stuck at about 9 10ths of upadate

Based on prior answers to similar question, I pressed both the shutoff button at the top and the home button at the same time and the apple logo which was showing with the 9 10ths completed bar, shut off. Then the Apple logo came back on and it rebooted OK.

Wish Apple would have a Q&A page and for free, to help users.

Thanks to those who provided answers that led me to try a two button press to see what would happen, with a good result.

Since the machine was not working, there wasn't much to loose, and I did not want to try a reformat type of option at this point.

Hope this ques + answer may help.