Introduction
I have used Swift for windows 1.9 for debugging purpose. But you can use any Swift programming language compiler as per your availability.
Write a Swift program to create a string made of two copies of the last two characters of a given string
import Foundation
func new_string(_ str: String) -> String {
var result = ""
var last_two_index = str.endIndex
for _ in 0..<2 {
last_two_index = str.index(before: last_two_index)
}
let last_2_chars = str.substring(from: last_two_index)
for _ in 0..<2 {
result.append(last_2_chars)
}
return result
}
print(new_string("tech"))
print(new_string("study"))Result
