Explain the difference between using the git rebase and git merge commands when integrating changes into branches.

git merge and git rebase are two methods of integrating changes from one branch into another, but they work differently:

• git merge creates a new merge commit, combining the histories of both branches. The history retains all branching and commits, providing a complete picture of development.

• git rebase moves the commits of the current branch onto another branch, rewriting history. This makes the history more linear and clean but changes commit hashes.

Example:

# merge
git checkout feature
git merge main

# rebase
git checkout feature
git rebase main

When to use:

• merge is suitable for preserving the full history and when transparency of branches is important.
• rebase is convenient for simplifying history before merging into the main branch, to avoid unnecessary merge commits.

Important: It is not recommended to rebase public branches, as it changes history and can cause conflicts for other developers.