A system that records changes to files over time so you can review history, collaborate, and restore earlier versions.
Version control lets teams work on the same codebase without overwriting each other's changes. Every change is saved as a commit with a description, author, and timestamp. If a new change introduces a bug, developers can see exactly what changed and roll it back.
Modern systems are mostly distributed, with Git the dominant example, meaning every developer has a full copy of the history. Branches let people work on features in isolation and merge them when ready, usually after code review through a pull request. Version control is not just for code: writers, designers, and data teams use it for documents, configuration, infrastructure definitions, and even datasets. It is a foundation of CI/CD and DevOps practices.
Continuous Integration and Continuous Delivery or Deployment: practices that automatically build, test, and release code changes.
GitA free, open-source distributed version control system that tracks changes to code and lets many developers collaborate safely.
Infrastructure as CodeManaging and provisioning servers, networks, and cloud resources through machine-readable configuration files instead of manual setup.
Pull RequestA request to merge a set of code changes into a shared codebase, giving teammates a chance to review and discuss them first.
Semantic VersioningA version numbering scheme in the form MAJOR.MINOR.PATCH that signals whether a software update adds features, fixes bugs, or breaks compatibility.
A step-by-step software engineering roadmap with skills, milestones and realistic timelines, plus how to land your first developer role with or without a degree.
A month-by-month plan to learn to code for free with freeCodeCamp, The Odin Project, CS50x and MDN, plus projects that keep you accountable.
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