Steps

1. How to initialize a Sequence of donuts

The code below shows how to initialize a Sequence of donut elements of type String.

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 check if a sequence is not empty using nonEmpty function

The code below shows how to use the nonEmpty method to test whether the donuts Sequence is not empty.

println("\nStep 2: How to check if a sequence is not empty using nonEmpty function")
println(s"Is donuts sequence NOT empty = ${donuts.nonEmpty}")

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

Step 2: How to check if a sequence is not empty using nonEmpty function
Is donuts sequence NOT empty = true

3. How to create an empty sequence

The code below show how to create an empty Sequence of type String. We will then use this Sequence to test whether it is empty in Step 4.

println("\nStep 3: How to create an empty sequence")
val emptyDonuts: Seq[String] = Seq.empty[String]
println(s"Elements of emptyDonuts = $emptyDonuts")

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

Step 3: How to create an empty sequence
Elements of emptyDonuts = List()

4. How to find out if sequence is empty using nonEmpty function

With the empty Sequence from Step 3, we can call the nonEmpty method. As expected, the result is false because Sequence emptyDonuts from Step 3 does not have any elements.

println("\nStep 4: How to find out if sequence is empty using nonEmpty function")
println(s"Is emptyDonuts sequence empty = ${emptyDonuts.nonEmpty}")

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

Step 4: How to find out if sequence is empty using nonEmpty function
Is emptyDonuts sequence empty = false