'subscript' is unavailable: cannot subscript String with a CountableClosedRange, see the documentation comment for discussion

Question

In Swift 4, I\'m getting this error when I try to take a Substring of a String using subscript syntax.

\'subscript\' is unavaila

Answer 1

You getting this error because result of subscript with range is Substring? not Substring.

You must use following code:

let myString: String = "foobar"
let mySubstring: Substring? = myString[1..<3]