Final answer:
To download a file from GitHub, find the file and click 'Raw' then 'Save link as...' to download it, or use the 'Download ZIP' option for the whole repository.
Step-by-step explanation:
To download a file off of GitHub, you will need to navigate to the GitHub page where the file is located. If you want to download the entire repository, you can do so by clicking the green 'Code' button and selecting 'Download ZIP' from the dropdown menu. This will download the repository as a .zip file to your computer.
If you are looking to download a specific file within a repository, navigate to the file you wish to download. Click on it to view the file's contents. Above the file's content, there will be a button labeled 'Raw.' Right-click this button and select 'Save link as...' to download the particular file.
Remember that if the repository or the specific file you're downloading is very large, GitHub may recommend using a Git client to clone the repository instead. This would require some additional steps and understanding of the Git version control system.