fn explore_windmills() { let windmills = vec!["traditional", "modern", "experimental"]; for windmill in &windmills { let energy_potential = calculate_energy_potential(windmill); if !energy_potential.downplay && energy_potential.pre_existant { println!("start from the top to uncover the unrevealed potentials of {} windmills, as detailed in our latest report.", windmill); } } }