Remove last character from string. Swift language

Question

How can I remove last character from String variable using Swift? Can\'t find it in documentation.

Here is full example:

var expression = \"45+22\"
e         


        

Answer 1

Swift 4:

let choppedString = String(theString.dropLast())

In Swift 2, do this:

let choppedString = String(theString.characters.dropLast())

I recommend this link to get an understanding of Swift strings.

Answer 2

Swift 4/5

var str = "bla"
str.removeLast() // returns "a"; str is now "bl"

Answer 3

Use the function removeAtIndex(i: String.Index) -> Character:

var s = "abc"    
s.removeAtIndex(s.endIndex.predecessor())  // "ab"

Answer 4

The easiest way to trim the last character of the string is:

title = title[title.startIndex ..< title.endIndex.advancedBy(-1)]