Reference

R version and build information
available()	Available R Builds
linux_distros()	Return information about Posit's (and some other) R builds for Linux
r_versions()	Query R's past and present versions
resolve()	Resolve an R version specification
rtools_versions()	List Rtools versions
Utility functions
current_r_platform()	Current R platform
Superseded functions
r_oldrel()	Version number of R-oldrel
r_release()	Version number of R-release
r_release_macos()	Latest R release with a macOS installer available for download
r_release_tarball()	Latest release for which a source tarball is available for download
r_release_win()	Latest R release with a Windows installer available for download