JavaScript Internals (521 Qs)•Part 3: DOM, Event Flow, Timers & Browser APIs (104 - 173)
What are the benefits of initializing variables
It is recommended to initialize variables because of the below benefits,
- It gives cleaner code
- It provides a single place to initialize variables
- Avoid undefined values in the code
Practical Code Example
javascript
// Benefits of variable initialization:
// 1. Avoids unexpected 'undefined' runtime bugs
// 2. V8 engine optimizes hidden classes when types are initialized predictably:
let userCount = 0; // Initialized to Number
let activeStatus = false; // Initialized to Boolean
let userList = []; // Initialized to Array