When should I use const, let, or var in JavaScript?

Can you explain when to use const, let, and var in JavaScript?

Sure! In JavaScript, use 'const' for variables that won't change, 'let' for block-scoped variables, and 'var' for function-scoped variables.

What happens if I try to reassign a const variable?

If you try to reassign a const variable, you'll get a TypeError because const variables cannot be reassigned.

Is it better to use let or var?

It's generally better to use 'let' over 'var' because 'let' has block scope, which helps avoid issues with variable hoisting.

Can you give me an example of each?

Of course! Here's an example:

const name = 'Alice'; // cannot be changed let age = 25; // can be changed var city = 'New York'; // function-scoped, can be redeclared.