Swift playground - How to convert a string with comma to a string with decimal

Question

I\'m new in the Swift world.

How can I converting a String with a comma to a String with a decimal?

The code work\'s fine with a dot (.)

The problem

Answer 1

EDIT: Updated to work with the current version of Swift:

let amount = "8,35"

var counter: Int = 0
var noCommaNumber: String!
for var carattere in (amount) {
    if carattere == "," { carattere = "." }
    if counter != 0 { noCommaNumber = "\(noCommaNumber ?? "\(carattere)")" + "\(carattere)" } else { noCommaNumber = "\(carattere)" } // otherwise first record will always be nil
    counter += 1
}

let importo = Float(noCommaNumber)