What does 'adding to the index' really mean in Git?

Question

I\'ve got a question regarding Git basics.

Basically, what does the action known as \"add to the index\" mean in Git? I understand it like this:

If for a

Answer 1

When you add a file, it's marking that as a file that you will commit once you run the git commit command. A shortcut to add all modified files automatically is to commit with git commit -a. Another shortcut if you are adding multiple new files at the same time is to run git add -A.