Deep Dive: Rust Ownership — TechBlog
Description: An illustrated walkthrough of Rust's ownership model.

# Deep Dive: Rust Ownership

By Jane Doe · Published 12 March 2026 · 8 min read

Rust's ownership model is what makes it unique among systems languages. In this article we'll walk through the three rules, with examples.

## The Three Rules

1. Each value has a single owner.
2. When the owner goes out of scope, the value is dropped.
3. You can have either
   - one mutable reference, or
   - any number of immutable references
   — but never both at the same time.

## A First Example

Consider this code:

    fn main() {
        let s = String::from("hello");
        takes_ownership(s);
    }

    fn takes_ownership(s: String) {
        println!("{}", s);
    }

## Comparison Table

Operation | Stack | Heap | Notes
--- | --- | --- | ---
Copy | implicit (`Copy`) | requires `.clone()` | primitive types only on stack
Move | — | invalidates source | default for `String`, `Vec`…
Borrow | cheap | cheap | checked at compile time

> "Ownership is Rust's most unique feature." — The Rust Book

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