In Swift, we can get the size of an array using the count property. Here's an example:
let numbers = [1, 2, 3, 4, 5]
let size = numbers.count
print(size) // Output: 5
In this example, count returns the number of elements in the numbers array, which is 5.
We can also get the size of an empty array:
let emptyArray = [Int]()
let emptyArraySize = emptyArray.count
print(emptyArraySize) // Output: 0
In this example, count returns 0 since the emptyArray contains no elements.