if-else.rs

// Example of an if-else statement in Rust
fn main() {

    // If/else statements are similar to other languages.
    if true {
        println!("true");
    } else if false {
        println!("false");
    } else {
        println!("neither");
    }

    // Rust supports six comparison operators: '==', '!=', '<',' >', '<=', '>='.
    // and two boolean operators: '&&' (and) and '||' (or).
    let n = 42;
    if n > 0 && n < 100 {
        println!("n is between 0 and 100");
    } else if n < 0 || n > 100 {
        println!("n is not between 0 and 100");
    }

    // The 'if' statement can return a value and can be used in a 'let'
    // statement.
    let condition = true;
    let number = if condition { 5 } else { 6 };
    println!("The value of number is: {}", number);

    // Using 'if let' expression, control is determined through pattern
    // matching instead of a conditional expression.
    let result: Option<i32> = Some(42);
    if let Some(value) = result {
        println!("The value is: {}", value);
    } else {
        println!("There is no value");
    }
}