Google Colaboratory is a free, cloud-based Jupyter Notebook environment that allows you to run R or Python code without having to install anything on your computer. This makes it a great option for people who want to run code but don't have a powerful computer available. It also means that you can access your code from anywhere, as long as you have an internet connection.
To get started with R in Google Colaboratory, you'll need to create a Google account and then sign in to the Colaboratory website. Once you're signed in, you can create a new notebook by clicking the "New Notebook" button. Then open Edit > Notebook settings menu and use the selector to choose from any installed kernels, including R, which is installed by default.
Once you've selected the R kernel, you can start writing code in your notebook. You can use any of the standard R functions and packages, and your code will be executed on Google's servers. This means that you can run even the most complex R code without having to worry about your computer's resources.
Google Colaboratory is a great tool for anyone who wants to learn R or Python, or for anyone who needs to run code but doesn't have a powerful computer available. It's free to use, and it's easy to get started.