👨‍💼 You've seen how TypeScript protects you from accessing non-existent properties!

When you tried to access product.rating, TypeScript said:

Property 'rating' does not exist on type '{ name: string; ... }'

🦉 This is one of TypeScript's core benefits—catching typos and missing properties at compile time instead of getting undefined at runtime.

Notice how the function parameter uses an inline object type. The function only requires name and price, so it can accept any object that has at least those properties.