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iOS Intermediate Swift Extensions and Protocols Extending a Native Type

Posted by Andrii Baraniuk
Andrii Baraniuk
Courses Plus Student 3,877 Points

Challenge doesn't accept my answer

This is the version that is confirmed on forums and still, the challenge is not accepted.

extension String { func add(n: Int) -> Int? { guard let intFromString = Int(self) else { return nil } return intFromString + n } }

types.swift 
// Enter your code below

extension String {
    func add(n: Int) -> Int? {
        guard let intFromString = Int(self) else {
            return nil
        }
        return intFromString + n
    }
}

1 Answer

Magnus Hållberg
Magnus Hållberg
17,232 Points
Magnus Hållberg
Magnus Hållberg
17,232 Points

It looks like its not your code that's wrong, its your input name that's not according to the challenge. You choose "n" the challenge is expecting "value". That's it.

Andrii Baraniuk
Andrii Baraniuk
Courses Plus Student 3,877 Points

It worked! Thank you.