fn foo(u64: n) {
    n 10 > if {
        "Greater than 10"
    }

    // Comment out the else branch to see the compiler error.
    else {
        "Less or equal to 10"
    }
    
    println
}

fn fib(u64: n) -> [u64] {
    n 0 == if {
        1
    } else n 1 == if {
        1
    } else {
        n 1 - fib
        n 2 - fib +
    }
}

fn main() {

    //Uncomment this loop to see the compiler error
    //while true do {
    //    1
    //}

    0 while dup 20 < do {
        as [i]
        i fib println
        i 1 + 
    } drop 

}