How to factorialize a number in JavaScript?

July 19, 2022

To factorialize a number in JavaScript, use this function: const factorial = n => n * (n <= 1 ? 1 : factorial(n - 1)).

Here's how you do it:

const factorial = n => n * (n <= 1 ? 1 : factorial(n - 1));

console.log(factorial(1)); // 1
console.log(factorial(2)); // 2
console.log(factorial(5)); // 120
console.log(factorial(10)); // 3628800