Did you know that every data scientist who builds a complex neural network starts with a fundamental question, “How does the output change when the input changes?“ A straight line equation y = ax+b answers it in the simplest way possible. y can incre...

As a Flutter developer who’s building a cloud-based ecosystem for digital media lifecycle management, I’m constantly looking for ways to speed up the transition from idea to prototype. In November 2025, Google launched antigravity, a new interactive ...

Many developers think that “real-time” is about Websockets, Live data, or instant refreshes on web application dashboards. And although these concepts are closely related to what real-time means, the systems engineering definition is a bit different....

Every time you open a website, your device talks directly to another server on the internet. Your IP address, location, and basic network details are visible to that server. In many cases, this is fine. But there are situations where you may want m...

"To understand is to perceive patterns." - Isaiah Berlin This is not a math book filled with complex formulas, theorems, and concepts that are hard to grasp. Instead, it’s a detailed guide where we’ll break complex ideas down into simpler terms. Eve...

Learn how to build agentic AI workflows. We just posted a course on the freeCodeCamp.org YouTube channel that provides a comprehensive overview of agentic AI, defining agents as software entities that use LLMs to perceive environments, make decisions...

OAuth 2.0 is an industry-standard authorization framework allowing third-party apps to access user data on another service (like Google or Facebook) without sharing passwords, instead using temporary, limited-scope access tokens for delegated access,...

We just posted a comprehensive music production course on the freeCodeCamp.org YouTube channel that bridges the gap between basic theory and professional execution. Miguel guides you through the entire lifecycle of a song using tools like FL Studio. ...

Have you ever wanted to add an AI-powered chatbot to your website, like Intercom or Drift, without paying high monthly fees? In this tutorial, you'll learn how to build a fully functional, embeddable AI chatbot widget using Cloudflare's serverless st...

You can use R as a powerful tool for data analysis, data visualization, and statistical modelling. In this guide, you’ll learn how to load real-world data into R, visualize patterns using ggplot2, build simple linear and logistic regression models, a...

While containers are quite lightweight and provide various benefits, it can be challenging to decide how best to deploy them. There are a number of ways to deploy and run Docker containers. But some are best for orchestrating and managing containers,...

Hi, I’m Ilyas. I’m a web developer, and this is my story about how I struggled with interviews for a long time and what finally helped me break through. I’ll talk about what failing basic interview questions taught me about recall, preparation, and s...

2025 has been an amazing year for the global freeCodeCamp community. And we’re thrilled to cap it off with the launch of several Christmas Gifts for you: freeCodeCamp's Python certification freeCodeCamp's JavaScript certification (Version 10) free...

In standard app development, the User Interface (UI) is static. You write code for a button, compile it, and it remains a button forever. GenUI flips this model on its head. With GenUI, Google’s Generative UI SDK, your application's interface becomes...

Vercel AI SDK is a TypeScript-first toolkit for building AI features. It streamlines text generation, embeddings, and structured outputs. We just posted a course on the freeCodeCamp.org YouTube channel that will teach you to use the Vercel AI SDK to ...