How to update all packages for a new R version quickly and easily?

Question

Suppose I have R version 3.x.x installed, and I upgrade to version 4.x.x, is there any quick/easy way to install all the new versions of the libraries I had installed?

Please assume all the packages are on CRAN

Answer 1

Following works for me:

update.packages(ask = FALSE, checkBuilt = TRUE)