Very simple questions if anyone can help:

(1) what is the value in saving workspaces, which is offered at every close?
I thought it might save the set up of the GUI but I cant work out what it
does ­ I run a script that loads the packages I need at the start of every
session.
(2) mathematica has a term (%) that when typed means the last returned
value, so  >  % + 1 say would return the last outputted value +1 .is there
an R equivalent please?

Many thanks 

glenn

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