Using closures in swift?

Example:

  let add: (Int, Int) -> Int = { 
      (a, b) in 
      return a + b 
  }
  print(add(5, 3))  // Outputs: 8
  

Solution:

Closures are self-contained blocks of functionality that can be passed around and used in your code. They are similar to lambdas in other programming languages.