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Kotlin Programming: The Big Nerd Ranch Guide, First Edition by David Greenhalgh, Josh Skeen

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Iteration

The tavern master makes a point of greeting each patron, as it is just good business to do so. Lists include built-in support for a variety of functions that allow you to perform an action for each element of their contents. This concept is called iteration.

One way to iterate through a list is a for loop. Its logic is, “for each element in the list, do something.” You give the element a name, and the Kotlin compiler will automatically detect its type for you.

Update Tavern.kt to print a greeting for each patron. (Also, remove the code from earlier that modifies and prints patronList to tidy up your console output.)

Listing 10.13  Iterating over the patronList with for (Tavern.kt)

... fun main(args: Array<String>) ...

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