developer-roadmap/src/data/question-groups/javascript/content/merge-arrays.md

Yes, you can merge multiple arrays into one array using the `concat()` method, or the spread operator `...`.

## concat()

The `concat()` method is used to merge two or more arrays. This method does not change the existing arrays, but instead returns a new array.

```js
const arr1 = [1, 2, 3];
const arr2 = [4, 5, 6];

const arr3 = arr1.concat(arr2);
console.log(arr3); // [1, 2, 3, 4, 5, 6]
```

## Spread operator

The spread operator `...` is used to expand an iterable object into the list of arguments.

```js
const arr1 = [1, 2, 3];
const arr2 = [4, 5, 6];

const arr3 = [...arr1, ...arr2];
console.log(arr3); // [1, 2, 3, 4, 5, 6]
```