- Immutable Reference
- Mutable Reference

Types of References - Rust Programming

References and borrowing are essential concepts that work alongside ownership to allow safe memory access and efficient resource management. They allow you to use data without transferring ownership.

University of Michigan - Ann Arbor

```rust
fn main() {
    let s1 = String::from("hello");
    let s2 = takes_and_gives_back(s1);

    println!("{}", s2);
}

fn takes_and_gives_back(some_string: String) -> String {
    // some_string comes into scope
   
    // some_string is returned and
    // its ownership is transferred back to the caller
    some_string
}
```

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