Rust logo
Rust 1.40.0


There is a new edition of the book and this is an old link.

An if expression allows us to branch our code depending on conditions.

fn main() {
    let number = 3;

    if number < 5 {
        println!("condition was true");
    } else {
        println!("condition was false");

You can find the latest version of this information here.