find factorial of a number javascript one line solution

1function factorialize(num) {
2  var result = num;
3  if (num === 0 || num === 1) 
4    return 1; 
5  while (num > 1) { 
6    num--;
7    result *= num;
8  }
9  return result;
10}

1function factorialize(num) {
2  if(num < 2) return 1;
3  return num *= factorialize(num - 1);
4}

1function factorial(n) {
2  return n < 0 || Boolean(n % 1) ? undefined : n == 0 ? 1 : factorial(n - 1) * n;
3};