Learn · Developer tools
Git is the standard tool for tracking changes to code. It records every edit as a snapshot, so a team can work on the same project at once, see who changed what, and roll back to any earlier version. Almost every software project uses it. Working without it is like writing without an undo button.
Git lets developers branch off to try changes safely, then merge them back when they're ready. If something breaks, you can see exactly what changed and return to a working state. That history is a safety net and a record of how the project evolved.
It's essential for teamwork, but valuable even solo, because it protects your work and lets you experiment without fear. Learning the basics (commit, branch, merge) is one of the highest-return skills for anyone writing code.
Updated July 2026
Related
Git is the tool that tracks code changes on your computer. GitHub is an online service that hosts Git projects so teams can store, share, and collaborate on them in the cloud. Git is the technology, GitHub is a popular place to keep and work on Git projects. GitLab and Bitbucket are alternatives.
Version control is the practice of recording every change to a project over time, so you can see its history, work in parallel, and undo mistakes. Git is the dominant version-control system. It matters because it turns code from a fragile single copy into a safe, traceable, collaborative thing.
CI/CD (continuous integration and continuous delivery) is an automated pipeline that checks and ships code. When a developer pushes a change, CI automatically runs tests and checks to catch problems, and CD automatically deploys the change if it passes. It makes releasing software faster, safer, and routine.
A package manager installs and manages the outside code libraries a project depends on. npm handles JavaScript packages, pip handles Python, and most languages have one. Instead of manually downloading and updating libraries, you list what you need and the package manager fetches the right versions.
A code editor is the program developers write code in. A basic editor is a smart text editor for code. An IDE (integrated development environment) adds more: debugging, testing, and project tools in one place. Visual Studio Code is the most popular editor in 2026, and AI-assisted editors have become common.
A linter automatically checks code for likely mistakes, risky patterns, and style issues as you write. A formatter automatically arranges code consistently (spacing, indentation, quotes). Together they catch small errors early and keep a codebase uniform, so it reads as if one person wrote it.