pi.js
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pi.js
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	const iterations = 1_000_000;

	function calculatePiLeibniz() {
	let pi = 0;
	let denom = 1;

	const limit = iterations - (iterations % 4);
	for (let i = 0; i < limit; i += 4) {
	pi += 1 / denom - 1 / (denom + 2) + 1 / (denom + 4) - 1 / (denom + 6);
	denom += 8;
	}

	let sign = 1;
	for (let i = limit; i < iterations; i++) {
	pi += sign / denom;
	sign = -sign;
	denom += 2;
	}
	return pi * 4;
	}

	const start = performance.now();
	const result = calculatePiLeibniz();
	const end = performance.now();

	console.log(`Pi (${iterations}) ≈ ${result}`);
	console.log(`Time: ${(end - start).toFixed(2)} ms`);