// There are no nested expressions yet, so we have to hack a little bit

fn main() {
    let year = 2020
    
    let divisibleBy4 = year % 4 == 0
    let divisibleBy100 = year % 100 != 0
    let divisibleBy400 = year % 400 == 0

    let ly = divisibleBy4 && divisibleBy100

    if ly || divisibleBy400 {
        return "Leap year"
    } else {
        return "Not a leap year"
    }
}