About CodingGyan

CodingGyan is a free place to learn programming by solving problems. Every problem has a clear statement, examples, hints, and solutions in Java, JavaScript, TypeScript and Python. Most problems show more than one approach, so you can see both a simple solution and an efficient one.

How to learn with CodingGyan

1. Pick a topic and start with the Beginner level.
2. Read the problem and try to solve it yourself first.
3. Open the solution, read the explanation, and compare it with your own idea.
4. Use the language tabs to see the same idea in another language.
5. Select "Mark as done" to track your progress.

No account is needed. Your progress is stored in your browser on this device and is never sent to a server.

How the solutions are written

• Comments are numbered steps (Step 1, Step 2, and so on) in plain English.
• Names are meaningful, and every solution is a complete program that reads its input and prints the answer.
• Each Java solution shows the Java versions it works in (8, 10, 17, 21 and 25). When a program uses only basic features, such as a simple Hello World, the same code works in every version.
• Solutions for JavaScript, TypeScript and Python show the lowest version they need.

Install CodingGyan on your device

CodingGyan opens in any modern browser on a phone, a tablet or a computer. No store or download is needed. To add an app icon to your device:

• Android (Chrome): open the menu and choose Install app or Add to Home screen.
• iPhone and iPad (Safari): tap Share, then Add to Home Screen.
• Computer (Chrome or Edge): select the install icon at the end of the address bar.

Pages you have already visited also open without an internet connection.