Borrowing on Sanketh's Blog

Rust Notes — Module 2

Tue, 17 Mar 2026 00:00:00 +0000

Rust Notes — Module 2: Borrowing & References

1. The Problem Ownership Alone Creates

If ownership always moves, passing values to functions becomes painful — you lose access to the value after the call:

fn print_string(s: String) {
 println!("{}", s);
} // s is dropped here

fn main() {
 let s = String::from("hello");
 print_string(s);
 // println!("{}", s); // ❌ s was moved into print_string, gone!
}

You’d have to clone everything or return ownership back — both are tedious. Borrowing solves this.