The Most popular coding challenge websites for 2018
The Most popular coding challenge websites for 2018

A great way to improve your skills when learning to code is by solving coding challenges. Solving different types of challenges and puzzles can help you become a better problem solver, learn the intricacies of a programming language, prepare for job interviews, learn new algorithms, and more. 



Below is a list of some popular coding challenge websites with a short description of what each one offers.

1. TopCoder: TopCoder is one of the original platforms for competitive programming online. It provides a list of algorithmic challenges from the past that you can complete on your own directly online using their code editor. Their popular Single Round Matches are offered a few times per month at a specific time where you compete against others to solve challenges the fastest with the best score. The top-ranked users on TopCoder are very good competitive programmers and regularly compete in programming competitions. 
2. Coderbyte: Coderbyte provides 200+ coding challenges you can solve directly online in one of 10 programming languages. The challenges range from easy to hard. They also provide a collection of algorithm tutorials, introductory videos, and interview preparation courses. Unlike HackerRank and other similar websites, you are able to view the solutions other users provide for any challenge aside from the official solutions posted by Coderbyte.

3. Project Euler: Project Euler provides a large collection of challenges in the domain of computer science and mathematics. The challenges typically involve writing a small program to figure out the solution to a clever mathematical formula or equation, such as finding the sum of digits of all numbers preceding each number in a series. You cannot directly code on the website in an editor, so you would need to write a solution on your own computer and then provide the solution on their website.




4. HackerRank: HackerRank provides challenges for several different domains such as Algorithms, Mathematics, SQL, Functional Programming, AI, and more. You can solve all the challenge directly online. They provide a discussion and leaderboard for every challenge, and most challenges come with an editorial that explains more about the challenge and how to approach it to come up with a solution. Aside from the editorial, you cannot currently view the solutions of other users on HackerRank. HackerRank also provides the ability for users to submit applications and apply for jobs by solving company-sponsored coding challenges.

5. CodeChef: CodeChef is an Indian-based competitive programming website that provides hundreds of challenges. You are able to write code in their online editor and view collections of challenges that are separated into different categories depending on your skill level. They have a large community of coders that contribute to the forums, write tutorials, and take part in CodeChef’s coding competitions.

6. CodeEval: CodeEval is similar to HackerRank where it also provides a collection of company-sponsored coding challenges that can help you get a job if you solve them well. Companies can create challenges and host competitions to recruit new developers for work.

7. Codewars: Codewars provides a large collection of coding challenges submitted and edited by their own community. You can solve the challenges directly online in their editor in one of several languages. You can view a discussion for each challenge as well as user solutions.

8. LeetCode: LeetCode is a popular Online Judge that provides a list of 190+ challenges that can help you prepare for technical job interviews. You can solve the challenges directly online in one of 9 programming languages. You are not able to view other users solutions, but you are provided statistics for your own solutions such as how fast your code ran when compared to other users. They also have a Mock Interview section that is specifically for job interview preparation, they host their own coding contests, and they have a section for articles to help you better understand certain problems.

9. Sphere Online Judge: Sphere Online Judge is an online judge that provides over 20k coding challenges. You are able to submit your code to an online editor. Sphere Online Judge also hosts their own contests and has an area for users to discuss coding challenges. They do not currently provide any official solutions or editorials like some other websites do though.




10. CodinGame: CodinGame is a bit different from the other websites because instead of simply solving coding challenges in an editor, you actually take part in writing the code for the game that you play directly online. You can see a list of games currently offered here and an example of one here. The game comes with a problem description, test cases, and an editor where you can write your code in one of the 20+ programming languages. Although this website is different than typical competitive programming websites such as the ones mentioned above, it is still popular amongst programmers who enjoy solving challenges and taking part in contests.

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Mukesh Rajput

Mukesh Rajput

I am a Computer Engineer, a small amount of the programming tips as it’s my hobby, I love to travel and meet people so little about travel, a fashion lover and love to eat food, I am investing a good time to keep the body fit so little about fitness also..

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