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10 websites to practice coding problems: Our picks

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Whether you’re just starting out as a coder or want to improve your coding skills, solving programming problems is part of the plan.

Convenient, free, and even fun, coding problem websites put your abilities to the test with individual exercises, friendly challenges, and insightful assessments.

Practicing your coding through these websites can increase your knowledge, develop your skills, and prepare you to schedule job interviews.

Best Websites to Practice Your Coding Skills

Is it difficult to learn coding? Starting from scratch can be tough, but coding challenges designed to test and advance your skills can help. We’ve rounded up 10 great websites for coding issues and listed them alphabetically for you.

Each website offers a collection of resources for learning to code or advancing what you already know.

1. CodeChef

CodeChef lets you choose from thousands of problems to practice skills like sorting, data structures, and dynamic programming. Problems are sortable by difficulty. Code Chef’s practice problems allow you to answer in one of over 50 programming languages ​​as you prepare for its monthly internal or external competitions.

CodeChef offers self-directed learning opportunities and mentorship programs alongside a community of coders, coding bootcamps, and technology certification programs.

2. Coderbyte

Designed for coding practice and improvement, Coderbyte offers coding challenges and courses aimed at helping you prepare for job interviews.

Coderbyte had over three million solutions with challenges in over 25 languages. Starter courses in algorithms, JavaScript, Ruby, and Python accompany interview kits and career resources.

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You can sign up for a free challenge and a free trial. A monthly subscription to Coderbyte costs $35 and an annual subscription is $150. Both give you access to all of Coderbyte’s resources.

3. Code Wars

Launched in 2012, Codewars offers practice kata, or small coding exercises, that you progress to as you develop your skills. Codewars kata are available in almost 60 programming languages ​​and in levels ranging from beginner to advanced.

You can develop your own kata, engage with the Codewars community, and master one or more languages ​​in the process. Feedback and creative learning facilitate creative thinking and innovation among Codewars users. Codewars also offers resources for educators and businesses.

4.CodinGame

With over 25 languages ​​supported, CodinGame offers challenge-based programming education through games, puzzles, and competitions.

CodinGame’s resources allow you to develop your programming skills, learn new concepts and interact with other coders through easy, medium, difficult and very difficult exercises.

CodeinGame leaderboard and awards allow you to be recognized by your peers and track your progress. Live streams, blogs and free discussion forums for developers support search, selection and retention programs for recruiters.

5. Geektastic

With human-reviewed technical assessments, Geektastic enables companies to customize coding challenges for talent acquisition and engineering team training. If you have coding experience, you can join Geektastic’s community of evaluators to create and test these challenges and get paid to evaluate contestants’ performance.

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Code challenges are offered in Java, Python, and PHP. Geektastic also offers skill assessments in Java, JavaScript, and basic coding. Joining as a developer is free, while flexible pricing accommodates businesses of all sizes.

6. HackerRank

HackerRank serves as a technical interview platform, but also provides coding practices for over 18 million users. The challenges offered by HackerRank cover topics such as algorithms, Java, Python, Ruby, and data structures.

HackerRank’s challenges allow you to test your code, debug it, and win one of its sprint, enterprise, language, or timed challenges. You can also earn certifications in specific skills or complete interview preparation kits. Prices range from $25/month for interview content to $819/month for team subscriptions.

7.LeetCode

LeetCode provides over 2,250 practice problems to its programming community. Individual challenges in topics such as algorithms, database structures, and dynamic programming accompany comprehensive study plans.

The LeetCode Programming Skills Study Plan incorporates three modules offered at easy, medium, or hard difficulty levels. LeetCode supports 14 programming languages ​​and hosts a playground tool to help you test, debug, and write code.

Registration is free. LeetCode Premium offers access to additional tools and premium content for a monthly subscription of $35 or an annual fee of $159.

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8. Euler Project

Named after mathematician Leonhard Euler, the Euler Project began in 2001. Recent and archival content is available free of charge to registered users.

The Euler Project offers computer programming problems that combine math with computer science and programming skills. With 108 programming languages ​​and over a million users, Project Euler offers problems of varying difficulty.

9. SPOJ

Sphere Online Judge, or SPOJ, trains users to code and create effective algorithms through over 20,000 practical problems. Problem scoring categories include challenges, tutorials, and puzzles. Leaderboards and a status table accompany ongoing contests that support over 45 programming languages ​​and compilers.

SPOJ offers a flexible testing system to automatically evaluate programs submitted by users. Users can design their own contests or participate in an online course at all programming levels, but it’s great for students.

10. TopCoder

TopCoder’s community of competitive designers, developers, data scientists and programmers develop their skills, show their expertise and earn money by improving their coding abilities. TopCoder pays individuals for their work, sells it to corporate clients, and runs contests designed to showcase the best coding talent in the world.

Customers use TopCoder to hire freelancers on demand, set challenges for the coding community, and find teams for projects.

This article has been reviewed by Monali Mirel Chuatico

Monali Mirel Chuatico, a woman with long black hair, smiles in a headshot.

In 2019, Monali Mirel Chuatico earned her bachelor’s degree in computer science, which gave her the foundation she needed to excel in roles such as data engineer, front-end developer, UX designer, and computer science instructor.

Monali is currently a Data Engineer at Mission Lane. As Captain of Data Analytics at a non-profit organization called COOP Careers, Monali helps new graduates and young professionals overcome underemployment by teaching them data analytics tools and mentoring them. in their career development.

Monali is passionate about implementing creative solutions, building community, advocating for mental health, empowering women and educating young people. Monali’s goal is to gain more experience in her field, broaden her skills and do meaningful work that will have a positive impact on the world.

Monali Mirel Chuatico is a paid member of the Red Ventures Education Integrity Network.

Last revised April 21, 2022.

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