algorithm for factorial of a number javascript code example

Example 1: factorial javascript function

function factorialize(num) {
  if(num < 2) return 1;
  return num *= factorialize(num - 1);
}

Example 2: javascript factorial of a number

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

// Examples
factorial(2);   // 2
factorial(3);   // 6