---
id: 56533eb9ac21ba0edf2244ba
title: Understand String Immutability
challengeType: 1
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert(myStr === "Hello World", "<code>myStr</code> should have a value of <code>Hello World</code>");'
  - text: ''
    testString: 'assert(/myStr = "Jello World"/.test(code), "Do not change the code above the line");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
// Setup
var myStr = "Jello World";

// Only change code below this line

myStr[0] = "H"; // Fix Me

```

</div>


### After Test
<div id='js-teardown'>

```js
console.info('after the test');
```

</div>

</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>