help pages for control elements

A few questions came up in class – how to find these help pages:
while:  All of the control structures weʻve been talking about are on one help page, which you can see by typing
 
> ?Control
 (I donʻt know why, the person who wrote the code just chose to do it that way). Itʻs not a well-written help page unfortunately, short on details. But there you have it.
%in%:  This is a very very helpful function. You should read this and test the examples.
> ?”%in%”
Note: any function that is written in operator form has to be enclosed in quotes. For example, “+”“*” etc.
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