What is the difference between let and const in JavaScript?

What is the difference between let and const in JavaScript?

In JavaScript, 'let' allows you to declare variables that can be reassigned, while 'const' is for variables that cannot be reassigned.

Can you give me an example of each?

Sure! For 'let':

let x = 10;
x = 20; // This is allowed

For 'const':

const y = 30;
y = 40; // This will throw an error

Are there any differences in scope between them?

Yes, both 'let' and 'const' have block scope, meaning they are only accessible within the block they are defined in.

When should I use let over const?

Use 'let' when you expect the variable's value to change, and 'const' when you want to ensure the variable remains constant.