how to undo add in git code example

Example 1: git undo add

// undo add for one file
git reset <file>

// undo add for all files
git reset

Example 2: revert git add

git reset <file> or git reset

Example 3: how to undo git add --all

git reset # Will unstage all the files you've added after your last commit

Example 4: undo git add but keep changes

git reset -- FILE_NAME