Vec Basics

Create, modify, and iterate over dynamic arrays (Vec).

Difficulty

Beginner

Code

fn main() {
    let mut v: Vec<i32> = Vec::new();
    v.push(1);
    v.push(2);
    v.push(3);
    println!("{:?}", v);

    let v2 = vec![10, 20, 30];
    println!("first: {}", v2[0]);
    println!("last: {:?}", v2.last());

    for val in &v2 {
        println!("{}", val);
    }
}

Explanation

This example demonstrates how to use vec basics 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 compound-types category to build a complete understanding of this topic.