how to push code github in exixting repu 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 push new repo to remote

$ git remote add origin <remote repository URL>
# Sets the new remote

# Push the changes in your local repository to GitHub.
$ git push -u origin master
# Pushes the changes in your local repository up to the remote repository you specified as the origin