Good news for those with active GitHub profiles: you can now add files to your repos by dragging and dropping them into the browser. Once a file is uploaded, you can add it to an existing branch ...

Learn how to add a GitHub repository to VS Code as well as how to install a handy extension to manage pull requests and issues.

GitHub will then keep track of the changes you made, creating different versions of files so you can revert back to old ones if you want (or just keep track of those changes for other reasons).

Seen a good third party Android library on GitHub? Find out how to add any library as a remote dependency, or how to clone and use it as a local dependency.

The git submodule add command creates a .gitmodules file. I will allow you to deduce on your own which one is the parent module and which one is the Git submodule. How to create submodules in GitHub ...