l-language/test/programs/26_guard.l

fn abs(x: i64) -> i64 {
    guard x >= 0 else { return -x; }
    return x;
}

fn main() -> i64 {
    print_i64(abs(10));   // 10
    print_i64(abs(-5));   // 5
    print_i64(abs(0));    // 0
    return 0;
}