pub mod basics;
pub mod collections;
pub mod data_structures;
pub mod enums_and_matching;
pub mod traits_and_generics;
pub mod ownership_borrowing;
pub mod polymorphism;
pub mod async_programming;
pub mod smart_pointers;
pub mod iterators;
pub mod lifetimes;
pub mod projects;
pub fn greet(name: &str) -> String {
format!("Hello, {}!", name)
}