Practice Good Scoping

Name: Javascript Fundamentals
Rating: 4.711000000000000000 (834 reviews)

Avoid Global Variables Global variables can lead to unexpected side effects and make code difficult to debug. Encapsulate variables within appropriate scopes to maintain control.
```
1// Avoid
2globalVar = 'I am global';
3
4// Prefer
5function myFunction() {
6  let localVar = 'I am local';
7}
```
Use Function Scope Localize variables within function scopes to prevent name conflicts and encourage modular programming.
```
1function calculateArea(radius) {
2  const PI = 3.14159;
3  return PI * radius * radius;
4}
```
Declare Variables Properly Use let or const instead of var to create block-scoped variables, restricting their usage to the appropriate scope.
```
1if (true) {
2    let blockScopedVar = 'I am confined to this block';
3  }
```
Avoid Reusing Variable Names Descriptive names that represent the purpose and context of variables prevent confusion and errors.
```
1// Avoid
2let name = 'John';
3function greet() {
4  let name = 'Doe';
5}
6
7// Prefer
8let firstName = 'John';
9function greet() {
10  let lastName = 'Doe';
11}
```
Use Proper Naming Conventions Clear and descriptive names improve readability and reduce scope-related issues.
```
1// Descriptive naming
2let userAge = 25;
3function calculateDiscount(price) { /* ... */ }
```

Instructions

Declare another function showLocalVar() inside the checkScope() function.

Inside the showLocalVar() function, console.log the variable localVar.

Call the showLocalVar() function inside checkScope() function.

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