Swift Tip: type annotation can be different from what type inference would choose.
Type Inference: var distance = 320 // Swift chooses Int
Type Annotation: var distance: Double = 320 // Swift told to use Double
Swift Tip: type annotation can be different from what type inference would choose.
Type Inference: var distance = 320 // Swift chooses Int
Type Annotation: var distance: Double = 320 // Swift told to use Double