4. Understanding Variable Scope in JavaScript Through Examples
   Scope in JavaScript refers to the region within a program where a variable can be accessed or used. It determines the visibility and lifetime of a variable
5. JavaScript Closures: A Simplified Explanation
   Imagine a function as a box. Inside this box, you have variables that hold values. When the function is called, these variables are accessible within the box
6. Alternative Methods to Check Variable Existence in JavaScript
   In JavaScript, a variable is a container that stores data. It's like a box where you can put something. A function is a block of code that performs a specific task
7. Understanding Code Examples for Undefined and Null in JavaScript
   In JavaScript, undefined and null are two special values that represent different things:A variable that has been declared but hasn't been assigned a value yet is considered undefined