Bala Priya C    Hashing is a fundamental technique in programming that converts data into a fixed-size string of characters. Unlike encryption, hashing is a one-way process: you can’t reverse it to get the original data back. This makes hashing perfect for storing p...

Jessica Wilkins    The freeCodeCamp community just published our new Python certification. You can now sit for the exam to earn the free verified certification, which you can add to your résumé, CV, or LinkedIn profile. Each certification is filled with hundreds of hou...

Bala Priya C    If you’ve ever worked with configuration files, Docker Compose, Kubernetes, or CI CD pipelines, you’ve probably used YAML. It’s everywhere in modern development, and for good reason: it’s human-readable, simple, and powerful. In this guide, you’ll le...

Sara Jadhav    In this article, I’ll give you a beginner-friendly introduction to the Polars library in Python. Polars is an open-source library, originally written in Rust, which makes data wrangling easier in Python. The syntax of Polars is very similar to Pandas...

Beau Carnes    We just posted a course on the freeCodeCamp.org YouTube channel that will teach you how to become an AI Researcher. This course will guide you step-by-step, starting with the foundational mathematics essential for understanding modern AI, before divi...

Md. Fahim Bin Amin    If you’re working on complex Machine Learning projects, you’ll need a good Graphics Processing Unit (or GPU) to power everything. And Nvidia is a popular option these days, as it has great compatibility and widespread support. If you’re new to Machin...

Manish Shivanandhan    Model Context Protocol, or MCP, is changing how large language models connect with data and tools. Instead of treating an AI model as a black box, MCP gives it structured access to information and actions. It is like the USB-C port for AI, creating...

Manish Shivanandhan    Search is one of the most important features in modern applications. Users expect instant answers, useful suggestions, and results that match their intent even when they make spelling mistakes. Most traditional search systems struggle to deliver thi...

Manish Shivanandhan    Python development looks simple from the outside. But managing real projects is rarely easy. You need to install packages, update them, avoid version conflicts, create virtual environments, and prepare your project for distribution. Many beginners th...

Mari    When you click on most backend development tutorials, they often teach you what to do, not how to think.That’s why many developers only realize their mistakes after they start building. So, how does one actually think like a backend developer? Before...

Nneoma Uche    Several languages and frameworks depend on dependency injection no pun intended. Go, Angular, NestJS, and Python’s FastAPI all use it as a core pattern. If you’ve been working with FastAPI, you’ve likely encountered dependencies in action. Perhaps yo...

Manish Shivanandhan    Large language models are powerful, but they can also be unpredictable. They might generate long explanations when you expect a short summary, skip fields in a JSON output, or change the format completely from one request to another. When you’re buil...

Bala Priya C    In software development, you’ll run into XML (Extensible Markup Language) when working with configuration files, API responses, data exports, and more. While there are powerful third-party libraries for parsing XML, Python’s standard library already ...

Manish Shivanandhan    Artificial intelligence is moving fast. Every week, new tools appear that make it easier to build apps powered by large language models. But many beginners still get stuck on one question: how do you structure the logic of an AI application? How do y...

Hew Hahn    Python package managers let you install and manage dependencies like NumPy, pandas, and so on right from your terminal. In this article, you will learn how to use uv an extremely fast Python package manager. Prerequisites To get the most out of this ...