For today's coding challenge, you'll determine if a plane has enough fuel to take off (and there'll be some converting between liters and gallons of fuel, too). Check it out on the freeCodeCamp mobile app.

Keeping an API documentation in sync with API changes can be tricky. So here, Ezinne teaches you how to automate your docs updates with GitHub Actions and OpenAI. You'll learn about versioning, how to set up your workflow and an OpenAI specification, and more. www.freecodecamp.org/news/how-to-...

There's a lot of info stored on your phone - so how do you keep it safe? Here, Manish goes through some key best practices for protecting your phone's data. He talks about location tracking, strong passwords, app permissions, using eSIMs, managing wifi, and more. www.freecodecamp.org/news/how-to-...

Many devs love Go for its simplicity - and a lot of this comes from its small core group of data structures. There are three main ones you'll need to know: arrays, slices, & maps. In this tutorial, Gabor explains how each one works in depth with Go code examples. www.freecodecamp.org/news/arrays-...

Many web apps need to upload files. And here Anthony teaches you how to use Flutter Web & Firebase Storage to build an upload service. It'll upload single + multiple files, return file download URLs, & use dependency injection to keep the code modular & testable. www.freecodecamp.org/news/how-to-...

Fine-tuning turns a general LLM into a reliable specialist for your domain & tasks. In this course Tatev teaches you how to fine-tune your LLMs. You'll learn what fine-tuning means, different methods, how to work with huge models on your home workstation, & more. www.freecodecamp.org/news/how-to-...

Hono is a small, fast framework that lets you "write once, run anywhere". It's built on top of Web Standards, making your code portable across pretty much any JavaScript runtime. In this guide, Mayur teaches you how to build production-ready web apps with Hono. www.freecodecamp.org/news/build-p...

Have you ever heard of SCREAMING_SNAKE_CASE? Well, for today's coding challenge, you'll convert a string to it. Have fun with that on the freeCodeCamp mobile app.

Postman is a powerful tool for testing, automating, & collaborating on API development. Many API testing tasks are repetitive, so Dominic shows you how to use Postman scripts to simplify things. You'll learn how to get & reuse auth tokens across API requests. www.freecodecamp.org/news/how-to-...

If you want to submit an app to the iOS App Store this course is for you. Shad teaches you how to generate credentials, register your device, & get your app running. Then he explains how to use CI/CD to push your app to GitHub & auto-build, test, & distribute it. www.freecodecamp.org/news/how-to-...

Expense trackers can be super helpful for managing your finances. But many lack the features you might want - so why not build your own? In this tutorial, Happiness walks you through building a smart expense tracker app with Python and LLMs. www.freecodecamp.org/news/build-s...

AI agents are becoming a powerful tool for helping devs get things done. Here, Tarun walks you through building your own agent using Gemini in Python. This AI Study Planner agent remembers your conversation history & uses a search tool to access online resources. www.freecodecamp.org/news/how-to-...

Chatbots are helpful in a wide variety of industries. And in this tutorial, Anthony walks you through building a medical chatbot with Flutter and Gemini. You'll set up your dev environment, walk through the code step by step, & learn how you can improve the app. www.freecodecamp.org/news/how-to-...

For today's coding challenge, you'll write a simple program that determines the winner of a game of Rock, Paper, Scissors. Check it out on the freeCodeCamp mobile app.

If you want to learn full stack web dev, this course is for you. The MERN stack (MongoDB, Express, React, & Node.js) is a popular way to build web apps. You'll set up the back end, learn about controllers, middleware, & rate limiting, build pages, & more. www.freecodecamp.org/news/learn-t...

If you're using Docker containers, you'll need to decide how to run & deploy them. There are various options, but if you just have one container you don't a complex setup. In this guide, Agnes teaches you how to run and deploy one container using AWS Lambda. www.freecodecamp.org/news/how-to-...

Preparing for technical interviews can be stressful and overwhelming. But Ilyas has some insights from his recent job search to help make your prep more effective. In this guide, he talks about the importance of active recall, how he used flashcards, and more. www.freecodecamp.org/news/how-to-...

Wishing everyone who celebrated a very Merry Belated Christmas! Hope you got to spend some quality time with family, chosen family, and friends. ✨

Sometimes you'll need to get detailed info about your Linux system. Maybe you just gotten a new system or you're doing a security test. In this detailed guide, Zaira teaches you how to get info about your OS, kernel, memory, networks, & more via the command line. www.freecodecamp.org/news/get-lin...

For today's coding challenge, you'll be given a positive integer, and you'll need to return the sum of all its devisors. Check it out on the freeCodeCamp mobile app.

Attackers have gotten really good at stealing personal data from websites. So how can you protect yourself and keep your information secure? In this in-depth guide, Alex discusses how attackers typically steal data and strategies you can use to stay safe. www.freecodecamp.org/news/how-att...

Building a full-stack app is no small feat - but it can really teach you a lot. In this course, you'll build a Spotify clone with Flutter, FastAPI, and PostgreSQL. You'll learn about the MVVM architecture pattern, data storage, state management, & more. www.freecodecamp.org/news/create-...

The MERN stack (MongoDB, Express, React, and Node.js) is a popular way to build full-stack apps. To help you practice with it, Casmir created this tutorial. He helps you build a todo app & covers coding the UI, displaying tasks, setting up MongoDB Atlas, & more. www.freecodecamp.org/news/how-to-...

APIs allow different software applications to talk to each other and exchange info. And APIs, like all software, need helpful documentation. In this course, you'll learn useful strategies & best practices, tools that make writing docs easier, and more. www.freecodecamp.org/news/api-doc...

Building a social media app is a great way to practice your coding skills. And in this course you'll build an Instagram clone with React and Firebase. You'll learn about handling user interactions, authentication, data storage, search, and lots more. www.freecodecamp.org/news/code-an...

For today's coding challenge, you'll learn how to code a snowflake! See if you can do it on the freeCodeCamp mobile app.

A computer's operating system manages hardware & software and provides key services for various programs. And in this course, you'll learn all about how an OS works. It covers types of OSs, process management, CPU scheduling, memory management, & more. www.freecodecamp.org/news/learn-a...

AI agents can help you add a bunch of cool functionality to your apps. And in this course, you'll learn how to build a support agent with the Vercel AI SDK. The agent will decide whether to answer questions based on your docs or search the web in real time. www.freecodecamp.org/news/build-a...

GenUI is Google's new generative AI SDK that can help you make your app's interface dynamic. And here, Anthony teaches you how to use it with Flutter. You'll build a Christmas card generator and even learn how to add your own custom widgets along the way. www.freecodecamp.org/news/how-to-...

freeCodeCamp just released the beta version of our new A1 Professional Chinese Curriculum. It will teach you the basics of Mandarin Chinese and help you practice writing using Pinyin and Hanzi. You'll test your knowledge with exercises and quizzes along the way. www.freecodecamp.org/news/freecod...

AI tools can help you edit images - from colorizing B&W photos to upscaling and denoising. In this guide, Manish teaches you some core techniques like GAN enhancement & artifact removal. You'll learn when to use each & how to plug them into your apps using APIs. www.freecodecamp.org/news/how-to-...

Computer vision has many applications in our every-day lives - like working out, for example. And here, Ekemini teaches you how to build a real-time AI gym coach with Vision Agents. Your app will be able to detect your movements & give you feedback on your form. www.freecodecamp.org/news/how-to-...

Firewalls are a key network security tool that have been around for a long time. And you might wonder - are they still useful and relevant? In this article, Manish explains how Firewalls work and why you do still need them. www.freecodecamp.org/news/what-fi...

When you're building traditional apps, you might use unit tests to find issues. But this isn't effective with AI apps, as those tests can't identify hallucinations, regressions, etc. So here, Yemi teaches you how to test your AI apps with an evaluation flywheel. www.freecodecamp.org/news/how-to-...

On this episode of the freeCodeCamp podcast, Quincy interviews developer Google Developer Expert & GitHub Star Santosh Yadav. He shares insights into rising in the ranks + how to succeed socially as a remote worker, how to manage health challenges, and more. www.freecodecamp.org/news/how-to-...

LLMs are powerful tools on their own - but adding agents can really boost their abilities. Here, Djibril helps you build an autonomous AI agent using LangChain & LangGraph. You’ll learn about summarizing data into text, creating tools the agent can call, & more. www.freecodecamp.org/news/how-to-...

Smart home devices can be super helpful and convenient - but how do they actually work? Well, that's what Rez was wondering - so he decided to build his own. Here, he walks you through building a Smart HomeKit virtual light in Go to help you grasp the details. www.freecodecamp.org/news/how-to-...

For today's coding challenge, you'll get a string that represents the subject line of an email. Your job is to determine how many times the email has been forwarded or replied to. Check it out on the freeCodeCamp mobile app.

The freeCodeCamp community just published our B1 English for Developers cert. So if you want to improve your English skills, this one's for you. You'll learn more complex grammar, how to describe past experiences, comparative & conditional structures, & more. www.freecodecamp.org/news/freecod...

Learning React can be tough - but building projects and solving coding challenges can help. And this hands-on course helps you do just that. In it, Bob walks you through 170+ coding challenges and 6 projects to teach you React fundamentals. www.freecodecamp.org/news/learn-r...

freeCodeCamp just released our new Relational Databases cert. So if you want to really dive into how databases work, this one's for you. You'll learn about code editors, bash scripting, SQL, Git, and more - with projects, review pages, and quizzes along the way. www.freecodecamp.org/news/freecod...

A database is a key part of many software systems. And over time, database design has changed and evolved, from the early B-Tree structures to more modern LSM Tree options. In this handbook, Ramesh shows you how to build an LSM Tree storage engine from scratch. www.freecodecamp.org/news/build-a...

Have you ever had your wireless earbuds act like they've never met your phone before? Bluetooth is pretty awesome, but it can be finicky sometimes. Here, Nikheel explains how bluetooth works, why it sometimes struggles with Android, and what you can do about it. www.freecodecamp.org/news/how-to-...

Hey everyone! 👋 As freeCodeCamp closes out the year, we're looking for feedback to help guide our community's direction for 2026. Let us know what you loved (and what we can fix) in this quick survey: forms.nhcarrigan.com/o/docs/forms... Thank you! ❤️

For today's coding challenge, you get to go shopping (figuratively speaking, that is). You'll have an amount of money, and an array of items you want to buy - and you'll have to determine how many you can afford. Go solve it on the freeCodeCamp mobile app.

Graph Algorithms are behind many technologies we use all the time - like Google Maps & Netflix's recommendation engine. In this guide, Oyedele teaches you about some of the most common ones (like Breadth-First Search & Dijkstra's Algorithm) with Python examples. www.freecodecamp.org/news/graph-a...

Sometimes you may be working with partitioned data in Spark and need to preserve folder structure. In this guide, Arun teaches you how to copy/export deeply nested partitions (year/month/day/hour) using various techniques (step-by-step Scala example included). www.freecodecamp.org/news/how-to-...

There are many different students in today's classrooms with many different abilities. And AI tools can make a big difference in how they learn. In this guide, Omotayo walks you through building a Speech-to-Text & Text-to-Speech accessibility tool in Python. www.freecodecamp.org/news/build-a...

If you want to practice your full-stack development skills, this one's for you. David walks you through all the details of building a social learning platform. You'll use Next.js, Stream, & Supabase and set up real-time chat, a video conferencing feature, & more. www.freecodecamp.org/news/how-to-...

It's common to use single monolithic apps for frontend development. But there can be problems as projects grow. Here, Andrew dives into what micro frontends are and how they work. You'll learn about how to break frontends into smaller apps for more flexibility. www.freecodecamp.org/news/complet...