You're using print() wrong!
 	 It's likely that the first line of Swift you wrote went something like this:    print("Hello, world!")  I'm telling you today that  	 you're doing it wrong .   	    	 What's wrong with print statements!?    	 When you print in Swift, you send a text stream to an output device (i.e. the console screen).    This is extremely useful for debugging, but when used in production there are 2 major problems:   1. Security   2. Inefficiency    	   1. What are the security issues with print()?   When printing to the console, the output is accessible to your app's users - if a bad actor knows what she is doing, she can connect her device to a computer and read the live print statements of running apps.    	 As a side note - the exact same is true with your app's network calls by using  		 Charles Proxy , so make sure not to send any sensitive data to the client! 	   It's very easy to leave print statements for debugging forgotten about printed out in a live...