Write a Swift program to return the first half of a given string of even length

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.

func first_half_str(_ input: String) -> String {
    let chars = input.characters
    let first_half = chars.prefix(input.characters.count / 2)
 
    return String(first_half)
}
print(first_half_str("Tech"))
print(first_half_str("Study"))

Result