juniorRust
What is ownership in Rust?
Updated May 24, 2026
Short answer
Ownership is Rust’s memory management model where each value has a single owner responsible for its cleanup.
Deep explanation
Rust enforces memory safety without a garbage collector by ensuring each value has exactly one owner. When the owner goes out of scope, Rust automatically calls drop to free memory. This prevents dangling pointers and double frees at compile time.
Real-world example
Used in systems programming where memory safety and performance are critical, such as OS components.
Common mistakes
- Assuming multiple variables can own the same heap value without borrowing or cloning.
Follow-up questions
- What happens when ownership is moved?
- How does Rust prevent double free errors?