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Haitham Alam
2,685 PointsHelp with the challenge plz
Can i know what's wrong with my code??
// Enter your code below
extension String {
func add() -> Int? {
let number: Int
if number == Int(self) -> Int {
return self
} else {
return nil
}
}
}
1 Answer
Steven Deutsch
21,046 PointsHey Haytham Alam,
What we need to do here is create a method called "add" as an extension to the String type. This method will take an Int as its only parameter (to be added to the String when possible) and return an optional Int? based on whether the operation is possible.
Inside the body of this method, I use a guard statement to make sure that our String can be converted to an Integer. In cases where the conversion is not successful, we will return nil.
If the conversion from String to Int is successful, we will return the Int value of the converted string + the number we passed in when calling this method.
// Enter your code below
extension String {
func add(n: Int) -> Int? {
guard let conversion = Int(self) else {
return nil
}
return conversion + n
}
}
Hope this helps. Good Luck!