---
id: 56533eb9ac21ba0edf2244bf
title: Local Scope and Functions
challengeType: 1
videoUrl: 'https://scrimba.com/c/cd62NhM'
forumTopicId: 18227
---
## Description
Variables which are declared within a function, as well as the function parameters have local scope. That means, they are only visible within that function.
Here is a function myTest with a local variable called loc.
```js
function myTest() {
var loc = "foo";
console.log(loc);
}
myTest(); // logs "foo"
console.log(loc); // loc is not defined
```
loc is not defined outside of the function.
## Instructions
The editor has two `console.log`s to help you see what is happening. Check the console as you code to see how it changes. Declare a local variable `myVar` inside `myLocalScope` and run the tests.
**Note:** The console will still have 'ReferenceError: myVar is not defined', but this will not cause the tests to fail.
## Tests
```yml
tests:
- text: The code should not contain a global myVar variable.
testString: |
function declared(){
myVar;
}
assert.throws(declared, ReferenceError);
- text: You should add a local myVar variable.
testString: assert(/functionmyLocalScope\(\)\{.+(var|let|const)myVar[\s\S]*}/.test(__helpers.removeWhiteSpace(code)));
```
## Challenge Seed
```js
function myLocalScope() {
// Only change code below this line
console.log('inside myLocalScope', myVar);
}
myLocalScope();
// Run and check the console
// myVar is not defined outside of myLocalScope
console.log('outside myLocalScope', myVar);
```
## Solution
```js
function myLocalScope() {
// Only change code below this line
var myVar;
console.log('inside myLocalScope', myVar);
}
myLocalScope();
// Run and check the console
// myVar is not defined outside of myLocalScope
console.log('outside myLocalScope', myVar);
```