Drill 20: Make it smaller — Functions and control flow

fn level(minutes: u32) -> u32 {
    if minutes < 10 {
        1
    } else if minutes < 20 {
        2
    } else {
        3
    }
}

fn main() {
    let level = level(12);
    println!("level {}", level);

    let mut count = 0;
    loop {
        count += 1;
        if count >= 3 {
            break;
        }
    }
    println!("looped {} times", count);

    while count < 5 {
        count += 1;
    }
    println!("count now {}", count);

    for i in 1..4 {
        println!("lesson {}", i);
    }

    for i in 1..=3 {
        println!("inclusive {}", i);
    }
}