swift - Get the last character of a string without using array?

Question

I have a string

let stringPlusString = TextBoxCal.text

I want to get the last character of stringPlusString. I do not want to use array.

Java has charAt but I could not find something similar in Swift

Answer 1

Using last to get the last Character

For Swift 4:

let str = "hello world??"
let lastChar = str.last!   // lastChar is "??"

For Swift 2 and Swift 3:

let str = "hello world??"
let lastChar = str.characters.last!   // lastChar is "??"

For Swift 1.2:

let str = "hello world??"
let lastChar = last(str)!   // lastChar is "??"

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Subscripting the String to get the last Character

This works for Swift 3 and Swift 4:

let str = "hello world??"
let lastChar = str[str.index(before: str.endIndex)]   // lastChar is "??"

And for Swift 1.2 and Swift 2:

let str = "hello world??"
let lastChar = str[str.endIndex.predecessor()]   // lastChar is "??"