find the kth smallest key in a map in swift

main.swift
func findKthSmallestKey<K: Comparable, V>(in dictionary: [K: V], k: Int) -> K? {
    let keys = Array(dictionary.keys).sorted() // Extract and sort the keys
    if k > 0 && k <= keys.count { // Check if k is within range
        return keys[k-1] // Return kth smallest key
    }
    return nil // Return nil if k is out of range
}
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main.swift
let myDictionary = ["a": 1, "c": 3, "b": 2, "e": 5, "d": 4]
if let kthSmallestKey = findKthSmallestKey(in: myDictionary, k: 3) {
    print("The 3rd smallest key is: \(kthSmallestKey)") // Output: The 3rd smallest key is: c
} else {
    print("Invalid k value")
}
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