To push your local codebase to GitHub, follow these steps with the complete set of Git commands:

Full Command Sequence:

1. Initialize the Git Repository (if not already done):

    git init
   

2. Add Remote Repository URL:
   Replace <repository-url> with your GitHub repository link (e.g., https://github.com/username/repository.git).

    git remote add origin <repository-url>
   

3. Stage All Changes:

    git add .
   

4. Commit the Changes:
   Replace "Your commit message" with a meaningful commit message.

    git commit -m "Your commit message"
   

5. Push Code to GitHub:
   Use the -u flag to set the upstream branch for easier future pushes.

    git push -u origin main
   

Switching to an Existing Branch:

1. List all branches:

    git branch
   

   This will show all local branches. The current branch will have an asterisk (*) next to it.

2. Switch to the desired branch:

    git switch branch-name
   

   Or, if you're using an older version of Git:

    git checkout branch-name
   

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Creating and Switching to a New Branch

1. Create and switch to a new branch in one step:

    git switch -c new-branch-name
   

   Or, with older Git versions:

    git checkout -b new-branch-name
   

2. Push the new branch to the remote repository:

    git push -u origin new-branch-name
   

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Switching to a Remote Branch

1. Fetch all branches from the remote:

    git fetch
   

2. Check out the remote branch:

    git checkout branch-name
   

   If you’re using Git 2.23 or newer, you can also use:

    git switch branch-name
   

Notes:

• Replace main with master or the branch name you're using in your GitHub repository.

• If your repository is private or requires authentication, GitHub will prompt for credentials (username and personal access token or SSH key).