Online Coding Platforms and IDEs for Practicing Programming Skills

There are several online coding platforms and integrated development environments (IDEs) available that can be used to practice programming skills for the optional subject. These platforms provide a convenient and interactive environment for learning and practicing coding concepts. Here are some popular options:

1. EduRev Coding Platform:
- EduRev offers a comprehensive coding platform specifically designed for students to practice programming skills.
- It provides a wide range of programming languages such as C++, Java, Python, etc., catering to the needs of UPSC aspirants.
- The platform offers a user-friendly interface with features like code editor, compiler, and debugger.
- Users can write and execute code in real-time, and also receive instant feedback on their code's correctness.

2. HackerRank:
- HackerRank is a widely-used coding platform that offers various coding challenges and competitions.
- It supports multiple programming languages and provides a collaborative coding environment.
- Users can solve coding problems, participate in challenges, and track their progress.
- The platform also offers tutorials and practice exercises to enhance programming skills.

3. LeetCode:
- LeetCode is another popular platform for practicing coding skills, especially for technical interviews.
- It provides a vast collection of coding problems categorized by difficulty level and specific topics.
- Users can solve these problems using different programming languages and submit their solutions for evaluation.
- The platform also offers a discussion forum where users can interact with other programmers and learn from their experiences.

4. CodeChef:
- CodeChef is an online community and coding platform that hosts regular coding contests.
- It supports various programming languages and provides a code editor with features like syntax highlighting and code indentation.
- Users can participate in contests, solve practice problems, and improve their coding skills.
- The platform also offers tutorials and editorials to help users understand and learn different algorithms and data structures.

5. CodingBat:
- CodingBat is a coding platform that focuses on practice problems and exercises for beginner-level programmers.
- It primarily focuses on Python and Java programming languages.
- Users can solve coding problems categorized by different topics and receive immediate feedback on their solutions.
- CodingBat is known for its simplicity and provides a great learning experience for beginners.

In conclusion, there are several online coding platforms and IDEs available that can be used to practice programming skills for the optional subject. Platforms like EduRev, HackerRank, LeetCode, CodeChef, and CodingBat offer interactive environments, coding challenges, and tutorials to enhance coding skills. Aspirants can choose the platform that best suits their learning style and programming language preferences.