ex22.1_debugger_timed.js

let part = 0;
console.time('Leibniz');
for (let k = 0; k < 10000000; k++) {
    part = part + ((-1) ** k) / (2 * k + 1);
}
console.timeEnd('Leibniz'); // -> Leibniz: 456.60498046875 ms

let pi = part * 4;
console.log(pi); // -> 3.1415925535897915