Mutable Borrow

Use mutable references to modify borrowed data.

Difficulty

Intermediate

Code

fn push_world(s: &mut String) {
    s.push_str(", world!");
}

fn main() {
    let mut s = String::from("hello");
    push_world(&mut s);
    println!("{}", s);
}

Explanation

This example demonstrates how to use mutable borrow in Rust. Read the code carefully to understand the flow. Pay attention to where values are created, borrowed, moved, or consumed.

Key Concepts

• Rust's strong type system catches errors at compile time
• Ownership and borrowing rules ensure memory safety
• Pattern matching makes code expressive and exhaustive

Related Topics

Browse more examples in the ownership category to build a complete understanding of this topic.