Rust - Expressions - If Expression

Rust is a standard if, else if, else language, however, only boolean values are allowed for the conditional. Integers will cause a mismatched types error.

fn main() {
    let number = 12;

    // Standard if, else if, else expression
    if number % 3 == 0 {
        println!("Number is divisible by 3");
    } else if number % 2 == 0 {
        println!("Number is divisible by 2");
    } else {
        println!("Math hard, I gave up.");
    }

    // Using "if" in a let statement (because it's an expression, not a statement)
    let number = if number > 0 { number } else { 0 }; // Return types must match
    println!("number is now: {}", number);
}

If there are many else if expressions, Rust recommends using match instead.