how to use datedif formula how to find over all years ,months and days of any personn in Excel

Advance Work Of Excel course and Advance Excel in now  presented Tittle
how to use datedif formula how to find over all years ,months and days of any person in Excel
Calculate the days, months or years between two dates. See how to use the undocumented Excel DATEDIF function. See how to:
1) Calculate the number of completed days between two dates d
2) Calculate the number of completed months between two dates m
3) Calculate the number of completed years between two dates y
4) Calculate the number of days after completed years yd
5) Calculate the number of months after completed years my
6) Calculate the number of months after completed years ym subscribe my channel
(You tube) https://www.youtube.com/channel/UCT19oGQ6i6kEp5sz9R4GWOA
(Google+)
https://plus.google.com/u/0/115433594671281035281
(Blogger)
http://advanceworkofexcel.blogspot.com/
(Twitter)
https://twitter.com/saddam_khan45
(Facebook Page)
https://www.facebook.com/Advance-Work-Of-Excel-453336005013724/