swift image iterator

gistfile1.txt

var currentImagePosition = 0
    
    let images = ["Katherine_Johnson.jpg", 
                  "Margaret_Hamilton.jpg", 
                  "Grace_Hopper.jpg", 
                  "Barbara_Liskov.jpg",
                  "Ellen_Ochoa.jpg",
                  "Latanya_Sweeney.jpg"]
    
    func getNextImage() -> String {
        currentImagePosition = self.currentImagePosition + 1
        if (currentImagePosition == images.count - 1) {
            self.currentImagePosition = 0
        }
        return images[currentImagePosition]
    }