**Tell us what’s happening:**

Describe your issue in detail here.

Hows it going, I am having some trouble implmenting this idea in my head that I know works… I made a compare function that did symmetric difference between 2 arrays but I am having some trouble doing it for multiple, though I do have an idea on paper which I will explain below.

the idea goes as follows:

example: “sym([1, 2, 5], [2, 3, 5], [3, 4, 5])”

i.) arr =

ii.) compare( , [1,2,5]) → [1,2,5]

iii.) compare([1,2,5] ,[2,3,5]) → [1,3]

iV.) compare ([1,3] ,[3,4,5]) → [1,4,5]

so basically I start with an empty array which I would use to compare with the first array to get [1,2,5], then using that same answer I would compare it to [2,3,5] to get [1,3] and finally [1,3] compares with [3,4,5] to get our answer [1,4,5]. I have implmented the compare function but cant implment the rest.

example input

```
**Your code so far**
```

function sym(…args) {

let n = args.length;

let arr =;

for(let i = 0; i < n; i++){

}

arr = compare(args[0],args[1]);

console.log(arr);

return args;

}

function compare(arr1,arr2){

let x = arr1.filter(x => {return !arr2.includes(x)});

let y = arr2.filter(x => {return !arr1.includes(x)});

let z = x.concat(y).sort((a,b) => {return a-b});

return z;

}

sym([1, 2, 3], [5, 2, 1, 4]);

```
**Your browser information:**
```

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko/20100101 Firefox/96.0`

**Challenge:** Find the Symmetric Difference

**Link to the challenge:**