What is the difference between closures and functions in Swift?

What is the difference between closures and functions in Swift?

In Swift, functions are named blocks of code that can be called, while closures are unnamed and can capture variables from their surrounding context.

Can you give me an example of a closure?

Sure! Here's a simple closure that adds two numbers:

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

How do closures capture values?

Closures capture values by referencing the variables and constants from their surrounding context, allowing them to use those values even after the context has been destroyed.

Are closures more efficient than functions?

Not necessarily. The efficiency depends on the context and how they are used. Closures can be more convenient for short, inline tasks, while functions are better for reusable code.