TypeScript: what is the difference between export default and export and when to use which?

Hi everyone! I recently started learning TypeScript (previously wrote in pure JS) and got confused about exports. There seem to be two ways: `export default` and just `export`. But I don't understand when to use which. Here's an example. I have a file `user.ts`: ```typescript // user.ts export default class User { constructor(public name: string) {} } export function formatUser(user: User): string { return `User: ${user.name}`; } ``` And in another file I import: ```typescript // app.ts import User from './user'; // this works import { formatUser } from './user'; // this also works ``` But I've seen some people write `import * as UserModule from './user'`. Also, you can import default without curly braces, but named imports only with curly braces. Why is that? And the main q