---
id: 5d792535591db67ee15b4106
title: Step 45
challengeType: 0
dashedName: step-45
---
# --description--
Use the ternary operator to return `[]` if `start > end` and `[start].concat([end])` otherwise.
# --hints--
See description above for instructions.
```js
assert(
JSON.stringify(range(3, 2)) === '[]' &&
JSON.stringify(range(1, 3)) === '[1,3]'
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```