Why is hoisting important to know?

Can you explain what hoisting is in JavaScript?

Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their containing scope during compilation.

Why is it important to understand hoisting?

Understanding hoisting helps prevent errors related to variable initialization and scope, leading to more predictable code.

Can you give me an example of hoisting in action?

Sure! If you declare a variable with var and try to use it before its declaration, it will be undefined instead of throwing an error.

What are the differences between hoisting with var, let, and const?

var is hoisted and initialized to undefined, while let and const are hoisted but not initialized, leading to a ReferenceError if accessed before declaration.