What is variable scope in JavaScript?

What is variable scope in JavaScript?

Variable scope refers to the accessibility of variables in different parts of your code. In JavaScript, there are three main types of scope: global, function, and block scope.

Can you explain the difference between global and local scope?

Sure! Global scope means a variable is accessible from anywhere in your code, while local scope means a variable is only accessible within the function or block where it is defined.

What about block scope? How does it work?

Block scope is created by using curly braces {}. Variables declared with let or const inside a block are only accessible within that block.

Are there any examples of scope issues in JavaScript?

Yes! A common issue is when a variable is declared inside a function but is accessed outside of it, leading to undefined errors.