Playground

SELECT Fname, Lname
FROM EMPLOYEE
WHERE Dno = 5;

Query the COMPANY database from the textbook. Every run highlights the rows it changed.

<h1>Hello</h1>
<style>h1 { color: tomato }</style>
<script>console.log("hi")</script>

Write HTML, CSS and JavaScript in one file and watch the preview update as you type.

const xs = [3, 1, 2]
console.log(xs.toSorted())
// [ 1, 2, 3 ]

Runs right in your browser, with console output and top-level await.

nums = [int(x) for x in input().split()]
print(sum(nums))

Real CPython inside your browser. The first run downloads the runtime (about 10 MB) once.

#include <stdio.h>

int main(void) {
    printf("Hello, C\n");
}

Compiled with GCC and run. Put the program input in the stdin box first.

#include <iostream>

int main() {
    std::cout << "Hello, C++\n";
}

Compiled with G++ and run, with the full C++20 standard library.