---
id: 5d792535e3304f15a8890162
title: Step 50
challengeType: 0
dashedName: step-50
---
# --description--
Use the `charCodeAt(0)` method on `start` and `end` in `charRange`, like this: `start.charCodeAt(0)`.
# --hints--
See description above for instructions.
```js
assert(JSON.stringify(charRange('A', 'C')) === '[65,66,67]');
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```