Get nth character of a string in Swift programming language

Question

How can I get the nth character of a string? I tried bracket([]) accessor with no luck.

var string = \"Hello, world!\"

var firstChar = string[         


        

Answer 1

Swift 5.1.3:

Add a String extension:

extension String {

 func stringAt(_ i: Int) -> String { 
   return String(Array(self)[i]) 
 } 

 func charAt(_ i: Int) -> Character { 
  return Array(self)[i] 
 } 
}

let str = "Teja Kumar"
let str1: String = str.stringAt(2)  //"j"
let str2: Character = str.charAt(5)  //"k"