printing function and pass into onther function :    [enter image description here][1]e`


What does it mean passing Fun. to other who does it work'is it because we need a specify average grade so at first the programme well chooses A or b etc and then calculate using the get average? why if u do the opposite it 
and why we use return instead of print (my guess 'is it because it has to calculate or there is another answer? 


  [1]: https://i.stack.imgur.com/BWzvq.png