**Tell us what’s happening:**

When i check out the link:

it gives an example code of the rest parameter with n1, n2, n3

being replaced with …n

why doesn’t the same logic aplies to the lesson?

And can’t we use x, y z

to …z?

Things I tried to make any scense of it so far is:

As far as i understand it it replaces and stores the values

but is limited to only the ammouth of variables you have

a and b does not exceed this logic so thats not the problem

**Your code so far**

```
const sum = (...z) => {
return args.reduce((a, b) => a + b, 0);
}
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36`

.

**Challenge:** Use the Rest Parameter with Function Parameters

**Link to the challenge:**