Choose Rust for memory safety and performance-critical systems, or Go for rapid development of networked services and microservices. Rust enforces strict memory safety at compile time without a garbage collector, while Go prioritizes simplicity and concurrency with built-in garbage collection. Use Rust when you need fine-grained control over resources, and Go when you need to ship quickly with less boilerplate.
// Rust: Manual memory management via ownership
fn main() {
let s1 = String::from("hello");
let s2 = s1; // s1 is moved, not copied
println!("{s2}"); // s1 is invalid here
}