---
id: 5d792533717672657b81aa69
title: Part 018
challengeType: 0
isBeta: true
---
## Description
When defining an arrow function with a single argument, the parentheses can be omitted:
```js
const greeting = name => `Hello !`;
```
Define a function `highPrecedence` which takes a single argument `str` and returns it.
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
testString: assert(highPrecedence("a") === "a");
```
## Challenge Seed
```html
```
### Before Test
### After Test
```html
```
## Solution