Great work! Closures are an important tool in Swift that allows you to write and use higher-ordered functions. In this lesson, you learned how to:

• Define closures
• Pass closures to functions
• Use trailing closure syntax and closure syntax sugar
• Call built-in higher-order functions like filter
• Mark closures as @escaping so they can be stored for later
• Capture values inside a closure

Using closures and higher-ordered functions can be a great way to make your code more compact and readable!