Modern Web Design with HTML5, CSS3, and JavaScript - Function Scope in JavaScript

The video tutorial explains the concept of function and global scope in programming. It covers how variables declared within a function are not accessible outside of it, and how global variables can be accessed by functions. The tutorial provides examples of variable access in different scopes, including nested functions. It also addresses common errors in scope usage and demonstrates how to correct them. Advanced concepts such as scope hierarchy and parent scope are discussed to give a comprehensive understanding of how scopes work in programming.

What is the difference between function scope and global scope?

Explain why variables declared inside a function cannot be accessed outside of it.

How can you access a variable declared in the global scope from within a function?

What happens when you declare a function within another function regarding scope?

Describe how nested functions can access variables from their parent function.

What is the significance of using 'let' or 'const' in variable declaration within functions?

How can you modify a global variable from within a function?