find the kth smallest element in an array in swift

main.swift
func kthSmallestElement(_ array: [Int], k: Int) -> Int? {
    // Check that k is a valid index
    guard k > 0, k <= array.count else { return nil }
    
    // Sort the array in ascending order
    let sortedArray = array.sorted()
    
    // Return the element at index k-1
    return sortedArray[k-1]
}
306 chars
11 lines

main.swift
let myArray = [7, 2, 5, 1, 8, 9]
let k = 3

if let kthSmallest = kthSmallestElement(myArray, k: k) {
    print("The \(k)th smallest element in the array is \(kthSmallest)")
} else {
    print("Invalid value of k")
}
216 chars
9 lines

main.swift
The 3rd smallest element in the array is 5
43 chars
2 lines