Why are branches needed in Git?

Branches in Git allow developers to work on new features, fix bugs, or experiment without affecting the main codebase until they are fully ready. Each branch is an independent pointer to a commit.

Main usage scenarios:

• Parallel development: Multiple developers can work on different tasks simultaneously, each in their own branch.
• Change isolation: Changes made in one branch do not affect others until explicitly merged or rebased.
• Experiments: Creating temporary branches for testing ideas without risking corrupting the working version of the project.
• Version control: The main branch (usually main or master) contains a stable, release-ready version of the code, while other branches are used for developing subsequent versions or fixes.

A branch in Git is a lightweight pointer to a commit:

// Example of creating and switching to a new branch
git branch feature/new-feature
git checkout feature/new-feature

// Or a combined command
git checkout -b feature/new-feature

// Checking current branches
git branch

After completing work on a separate branch, its changes can be integrated into another branch, such as main:

// Switching to the target branch
git checkout main

// Merging changes
git merge feature/new-feature

Thus, branches are a fundamental tool for efficient, safe, and organized development processes using Git, allowing management of the flow of changes.