What does “not run” mean in R help pages?

Question

Sometimes on an R help page the phrase \"not run\" appears in comments. Check out this from the help page for \"with()\":

Examples
require(stats); require(gr         


        

Answer 1

In "Writing R Extensions" manual, in section about \examples{...} is said that

You can use \dontrun{} for text that should only be shown, but not run, and \dontshow{} for extra commands for testing that should not be shown to users, but will be run by example()

When you build a package then all code in \dontrun{} closure is visible in help as

## Not run:
...
## End(**Not run**)

edit: This answer was earlier.