freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-data-structures/create-complex-multi-dimensional-arrays/index.md

---
title: Create complex multi-dimensional arrays
---
# Create complex multi-dimensional arrays


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## Hints

### Hint 1
- The first string - `deep` - must be inserted three levels deep. This means within exactly threes sets of `[square-brackets]`.

```javascript
let threeLevelArray = [
  "first level",
  ["Two levels deep", ["Three levels deep"]]
];
```
- Using this logic insert strings `deep` , `deeper` and `deepest` in the matrix three levels deep, four levels deep and five levels deep respectively.


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## Solutions

<details><summary>Solution 1 (Click to Show/Hide)</summary>

```javascript
let myNestedArray = [
  // change code below this line
  ["unshift", false, 1, 2, 3, "complex", "nested"],
  ["loop", "shift", 6, 7, 1000, "method"],
  ["concat", false, true, "spread", "array", ["deep"]],
  ["mutate", 1327.98, "splice", "slice", "push", [["deeper"]]],
  ["iterate", 1.3849, 7, "8.4876", "arbitrary", "depth", [[["deepest"]]]]
  // change code above this line
];
```
</details>