Just like a normal function, you can pass arguments into arrow functions.
<blockquote>// doubles input value and returns it<br>const doubler = (item) => item * 2;</blockquote>
You can pass more than one argument into arrow functions as well.
</section>
## Instructions
<sectionid='instructions'>
Rewrite the <code>myConcat</code> function which appends contents of <code>arr2</code> to <code>arr1</code> so that the function uses arrow function syntax.
</section>
## Tests
<sectionid='tests'>
```yml
tests:
- text: User did replace <code>var</code> keyword.
testString: getUserInput => assert(getUserInput('index').match(/const\s+myConcat/g), '<code>myConcat</code> should be a constant variable (by using <code>const</code>).');