Which function can I use to clear the console in R and RStudio

The shortest and the quickest way to clear the global environment in R is by using shortcut keys from the keyboards. Simply hit Ctrl+L on the keyboard and you will see that everything written in the console will be erased and the console will be cleared.

Description Windows & Linux Mac Clear console Ctrl+L Ctrl+L

cat("")  is the code to send CTRL+L to the console and therefore will clear the screen.
You can also type cat("")
You can use Ctrl+L — Clear the Console.