Online JavaScript compiler

Run JavaScript code right in your browser. Nothing to install, no sign-up.

const name = require("fs").readFileSync(0, "utf8").trim();
console.log(`Hello, ${name}!`);

let total = 0;
for (let i = 1; i <= 10; i++) {
  total += i;
}
console.log("1 + 2 + ... + 10 =", total);

Input

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What next

Learn JavaScript → Problems