how to add project to git repository code example

Example 1: git push existing repo

cd existing_folder
git init
git remote add origin https://gitlab.com/abc.git
git add .
git commit -m "Initial commit"
git push -u origin master

Example 2: git add existing project to repository

git remote add origin <repository url>
git branch -M main
git push -u origin main

Example 3: how to upload existing project to github

git remote add origin remote repository URL
git remote -v
git push -f origin master