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in this video Im going to explore completion handlers what are they how can we create them and how can we use them theyre a fundamental concept in programming and are often referred to as callbacks as you proceed will also learn about escaping completion blocks and trailing closures well start with a playground as an introduction to develop the concept and end up with looking at a simple iPhone app to reinforce our learning Ill leave a link to both starter projects in the notes below if this is something you want to learn keep watching first consider this function all it does is wait two seconds then prints the text we can call this function and see it is doing what we expect it waits two seconds and then prints the string to the console so lets create an issue with this function first lets comment this out and look at sample function too this time we print a second statement after we have asked to print the first one lets call the function and we see that the second statement i
