if i make repo in github why i need to do git init code example

Example 1: git to gethub after create repi

Open Terminal.
Change the current working directory to your local project.
Initialize the local directory as a Git repository.
$ git init
Add the files in your new local repository. This stages them for the first commit.
$ git add .
# Adds the files in the local repository and stages them for commit. To unstage a file, use 'git reset HEAD YOUR-FILE'.
Commit the files that you've staged in your local repository.
$ git commit -m "First commit"
# Commits the tracked changes and prepares them to be pushed to a remote repository. To remove this commit and modify the file, use 'git reset --soft HEAD~1' and commit and add the file again.
At the top of your GitHub repository's Quick Setup page, click  to copy the remote repository URL.
Copy remote repository URL field
In Terminal, add the URL for the remote repository where your local repository will be pushed.
$ git remote add origin remote repository URL
# Sets the new remote
$ git remote -v
# Verifies the new remote URL
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 specif

Example 2: create a repository git terminal

git init
git add somefile
git commit -m "initial commit"
git remote add origin https://github.com/username/new_repo
git push -u origin master 

# New local repository
git init
git add .
git commit -m "Initial commit"

# New remote repository
# Create remote repository (likely on github), then:
git remote add origin https://github.com/username/new_repo #https
git remote add origin [email protected]:username/new_repo #ssh
# Now push
git push -u origin master