**Tell us what’s happening:**

Hi, my function returns 0 and I am not quite sure why. Can someone help me understand what I am doing wrong?

**Your code so far**

```
function factorialize(num) {
if (num===0) {
return 1;
}
var numbers = [];
var factorial = 0;
for (i=num; i>0; i--) {
numbers.push(num);
num--;
}
for (i=0; i<numbers.length-1; i++) {
factorial *= (numbers[i] * numbers[i+1]);
}
return factorial;
}
factorialize(5);
```

**Your browser information:**

Your Browser User Agent is: `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36`

.

**Link to the challenge:**

https://www.freecodecamp.org/challenges/factorialize-a-number