Searching R help for "for" and "repeat" loop(s) help file

I'm trying to load the page that describes these 'functions'. However, R console in windows seems to 开发者_如何学编程hate me, it just returns +

?for
?repeat

for is a reserved word. You have to use backticks if you want to look it up:

?`for`

As a reference for others who may be interested in searching for help in R:

?read:delim                    #Access a functions help file
??base::delim                  #Search for "delim" in all help files for functions in base
help.search("delimited")       #Search for "delimited" in all help files
RSiteSearch("Parsing Text")    #Search for the term "Parsing Text" on the R site