. has an inbuilt help facility similar to the man facility of UNIX. To get more information on any specific named function, for example solve the command is
help(solve)
An alternative is
?solve
For a feature specified by special characters, the argument must be enclosed in double or single quotes, making it a `character string':
help("[[")
Either form of quote mark may be used to escape the other, as in the string "It's important". Our convention in these notes is to use double quote marks for preference.
This facility has not yet been established on either the Macintosh or Windows versions of .. Users on these platforms must use either the HTML version of the help files or hardcopy versions.