How can I use type checking in JavaScript?

How can I use type checking in JavaScript?

In JavaScript, you can use type checking to ensure that variables hold the expected data types. You can use the typeof operator for basic type checking.

Can you give me an example of using typeof?

Sure! For example, you can check the type of a variable like this: let num = 5; console.log(typeof num); // 'number'.

What about using TypeScript for type checking?

TypeScript is a superset of JavaScript that adds static type checking. It allows you to define types for variables, function parameters, and return values, which helps catch errors at compile time.

Is TypeScript worth learning if I already know JavaScript?

Absolutely! TypeScript can improve your code quality and maintainability, especially for larger projects.