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 it's only accessible within the function or block where it's defined.

What happens if I declare a variable without using var, let, or const?

If you declare a variable without var, let, or const, it becomes a global variable, which can lead to unexpected behavior and bugs.

How does block scope work with let and const?

Block scope means that variables declared with let and const are only accessible within the block they are defined in, such as within an if statement or a loop.