if/else Rust example...

ifelse.rs

fn main() {
    let lang = "Rust";

    if lang == "Rust" {
        println!("The next-gen systems programming language!");
    } else if lang == "Haskell" {
        println!("A high-level, purely functional programming language.");
    } else if lang == "Elixir" {
        println!("Another aspiring, functional language.");
    } else {
        println!("Probably not an interesting language :-)");
    }
}