Variable Naming Best Practices in JavaScript

1. Avoid var Keyword: A Relic of the Past

Before ES6, the var keyword was the primary way to declare variables. However, it had some quirks and limitations that often led to unexpected results and made debugging more challenging.

In modern JavaScript, we generally avoid using var and instead opt for let and const, which offer more predictable and block-scoped behavior, making your code easier to understand and maintain.

2. let: Variables That Can Change

Use the let keyword to declare variables whose values you might need to change later in your code.

3. const: Constants for Unchanging Values:

If you have a value that shouldn’t change throughout your program, use the const keyword.

A good rule of thumb is to use const by default and only switch to let if you know you’ll need to reassign the variable’s value later.