its Swift 4.0 .when application run on physical device its show this type of error which is not understandable i want to convert location Latitude and longitude into float
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1`!` means "crash here if nil`. What's the point of all of the optional chaining if you just force-unwrap it at the end? – rmaddy Jan 18 '18 at 16:59
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i cant understand this whole because i m beginner – Muhammad Adeel Qureshi Jan 18 '18 at 17:08
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If you're a beginner, you might start by reading the sections of the language guide related to Optionals, Optional Binding, and Implicitly Unwrapped Optionals. – Phillip Mills Jan 18 '18 at 18:33