Steps

1. How to initialize a sequence of donut prices

The code below show how to initialize a Sequence of type Double to represent donut prices..

println("Step 1: How to initialize a Sequence of donuts")
val donuts: Seq[String] = Seq("Plain Donut", "Strawberry Donut", "Glazed Donut")
println(s"Elements of donuts = $donuts")

You should see the following output when you run your Scala application in IntelliJ:

Step 1: How to initialize a Sequence of donuts
Elements of donuts = List(Plain Donut, Strawberry Donut, Glazed Donut)

2. How to print all elements in reversed order using reverseIterator function

The code below shows how to use the reverseIterator to print all the elements in a collection in reversed order.

println("\nStep 2: How to print all elements in reversed order using reverseIterator function")
println(s"Elements of donuts in reversed order = ${donuts.reverseIterator.toList}")

You should see the following output when you run your Scala application in IntelliJ:

Step 2: How to print all elements in reversed order using reverseIterator function
Elements of donuts in reversed order = List(Glazed Donut, Strawberry Donut, Plain Donut)

3. How to iterate through elements using foreach method

In this example, we use the reverseIterator on the donut Sequence which returns an Iterator of type String, i.e. Iterator[String]. To print the elements of this iterator, we then make use of the foreach method.

println("\nStep 3: How to iterate through elements using foreach method")
val reverseIterator: Iterator[String] = donuts.reverseIterator
reverseIterator.foreach(donut => println(s"donut = $donut"))

You should see the following output when you run your Scala application in IntelliJ:

Step 3: How to iterate through elements using foreach method
donut = Glazed Donut
donut = Strawberry Donut
donut = Plain Donut