Working with Fixed-Size Arrays

Snippet

Working with Fixed-Size Arrays

Arrays in Rust have a fixed length and must contain elements of the same type. They are useful when you want your data allocated on the stack rather than the heap.

snippet.rs

rust

fn main() {
    let a: [i32; 3] = [10, 20, 30];
    let first = a[0];
    let length = a.len();
    println!("First: {first}, Length: {length}");
}

Breakdown

let a: [i32; 3] = [10, 20, 30];

Declares an array of exactly three i32 integers.

let first = a[0];

Accesses the first element using zero-based indexing.

a.len()

Returns the number of elements in the array.

Previous snippet Next snippet

More Beginner Rust exercises →

From your library

Working with Fixed-Size Arrays

Related