---
id: 5d79253a1e9abf29de64c177
title: Part 138
challengeType: 0
dashedName: part-138
---
# --description--
The `Array` function takes an argument `x` and creates an array of size `x` filled with `undefined`.
Make `range` return an array of `undefined` with size `end - start + 1`.
# --hints--
See description above for instructions.
```js
assert(
code.replace(/\s/g, '').includes('constrange=(start,end)=>Array(end-start+1)')
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```