The script is available for download from https://gallery.technet.microsoft.com//How-to-change-the-recovery-90bd7f36. You can also use Microsoft Script Browser for Windows PowerShell ISE to download the sample with one button click from within your scripting environment.
This script will demonstrate how to change all the recovery mode for all the user databases. With the server name and recovery mode provided, the script will change the recovery mode you want to apply to all the user databases.
It will be a big task for DBAs to change the recovery mode for all the databases one by one, this script will demo how to achieve this in an easier way.
You can find more All-In-One Script Framework script samples at https://aka.ms/onescriptingallery