how to add untracked files in git code example

Example 1: git remove untracked files

# Print out the list of files which will be removed (dry run)
git clean -n

# Interactive and you will get a quick overview of what is 
# going to be deleted offering you the possibility to include/exclude 
# the affected files
git clean -i

# To remove files, run
git clean -f

# To remove directories, run 
git clean -fd

# To remove ignored files, run 
git clean -fX

# To remove ignored and non-ignored files, run 
git clean -fx

Example 2: git add untracked files to ignore

git status --porcelain | grep '^??' | cut -c4- >> .gitignore

Example 3: how to remove untracked files in git

git clean -n