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The Code Playground is a browser-based coding environment built into Launchpad. Open it from the top navigation bar anytime you want to write and test code quickly — whether you’re experimenting with an algorithm, testing an approach before submitting, or practising without a formal problem. No installation. No configuration. Just open and start coding.

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Key Features

Use the Code Playground to test your approach before submitting on a problem page. It’s faster to debug logic errors here first, then move to the problem’s editor for final submission.

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How to Use

1

Open the Playground

Click the code/screen icon in the top navigation bar.
2

Start from the template

Your editor opens with a default C++ template ready to go.
3

Write your code

Write your code in the left panel.
4

Add test input

Add your test input in the “Input” panel on the right.
5

Run

Click the “Run Code” blue button to execute your program.
6

Check the output

View the output in the “Output” panel. Adjust and re-run as needed.
7

Save it

Click Save to store this code in your Snippets library for later.

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FAQs

C++ is available by default in the editor. You can also switch to other supported languages such as Python, Java, C, and PostgreSQL. The Playground additionally supports Web Development environments (HTML, CSS, JavaScript) as well as SQL practice environments, so you can experiment and practice across different technologies.
No — use the Save icon to save your code to Saved Snippets. If you close the tab without saving, your code will be lost.
Type your input in the “Input” panel on the right side. This text is passed to your program’s stdin when you click Run Code.