# Concepts

1 min read, 130 words rust concept

Memory Management
- no Garbage collection
- developers manage memeory in code
- stacks vs heaps
- runtime safety
Stack variables
- fast memeory retirievals
- rust uses stack for its default memory needs
- with types, compiler knows exactly how many memory to allocate for a specific type
Heap variables - memory that can grow and shrink
- Collections, lists, arrays
- Hash maps
Rust compiler cleans up all variables as soon as it goes out of scope
In rust, every data has a owner
- there can only be a single owner of data at a time.
- Rust defaults to memeory allocation whenever it can.