Rust Programming Cookbook

How to do it...

For this recipe, the steps are as follows:

1. Create a new project using cargo new execution-flow -- lib and open the project in an editor.
2. Basic conditionals such as if statements work just like in any other language, so let's start with those and replace the default mod tests { ... } statement in the file:

#[cfg(test)]mod tests {    #[test]    fn conditionals() {        let i = 20;        // Rust's if statement does not require parenthesis        if i < 2 {            assert!(i < 2);        } else if i > 2 {            assert!(i > 2);        } else {            assert_eq!(i, 2);        }    }}

3. Conditionals in Rust can do much more! Here is an additional test to show what they can do—add it before the last closing parenthesis:

    #[test]    fn more_conditionals() {        let my_option = Some(10); // If let statements ...