How to remove app from my MacBook Air?

Zandata wrote:

I want to uninstall R and RStudio software in order to install latest version of those software.

If this is the app you are referring to: https://support.rstudio.com/hc/en-us/articles/200554736-How-To-Uninstall-RStudio-Desktop their instructions say to just drag the app to the trash.

Zandata wrote:

Hi,

I would like to remove app from my "MacBook Air" and I don't know how to do that. I need help. Thank you.

What app would that be? Some apps can be dragged to the trash, others need to be uninstalled using the app's uninstall tool.