**Tell us what’s happening:**

Unsure of what I did wrong. If anyone could help me I’d really appreciate it.

**Your code so far**

```
const sum = (function() {
"use strict";
return function sum(x, y, z) {
const args = [ ...x, ...y, ...z ];
return args.reduce((a, b) => a + b, 0);
};
})();
console.log(sum(1, 2, 3)); // 6
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0`

.

**Link to the challenge:**

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/use-the-rest-operator-with-function-parameters/