How to create range in Swift?

Question

In Objective-c we create range by using NSRange

NSRange range;

So how to create range in Swift?

Answer 1

func replace(input: String, start: Int,lenght: Int, newChar: Character) -> String {
    var chars = Array(input.characters)

    for i in start...lenght {
        guard i < input.characters.count else{
            break
        }
        chars[i] = newChar
    }
    return String(chars)
}