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How to check if a LinkedList is empty in Kotlin

How to check if a LinkedList is empty in Kotlin.

Here's a step-by-step tutorial on how to check if a LinkedList is empty in Kotlin:

Step 1: Create a LinkedList​

To start with, let's create a LinkedList in Kotlin. You can create a LinkedList using the LinkedList class provided by the Kotlin standard library. Here's an example of how to create a LinkedList:

val linkedList = LinkedList<String>()

In this example, we have created a LinkedList of type String. You can replace String with any other data type based on your requirements.

Step 2: Add elements to the LinkedList​

Next, let's add some elements to the LinkedList. You can add elements to the LinkedList using the add method. Here's an example of how to add elements to the LinkedList:

linkedList.add("Apple")
linkedList.add("Banana")
linkedList.add("Orange")

In this example, we have added three elements ("Apple", "Banana", and "Orange") to the LinkedList.

Step 3: Check if the LinkedList is empty​

To check if the LinkedList is empty, you can use the isEmpty method provided by the LinkedList class. This method returns true if the LinkedList is empty, and false otherwise. Here's an example of how to check if the LinkedList is empty:

if (linkedList.isEmpty()) {
    println("The LinkedList is empty")
} else {
    println("The LinkedList is not empty")
}

In this example, we use the isEmpty method to check if the LinkedList is empty. If it is empty, we print "The LinkedList is empty". Otherwise, we print "The LinkedList is not empty".

Step 4: Test the code​

After writing the code, it's a good practice to test it with different scenarios to ensure that it works as expected. Here are a few scenarios you can test:

  • Test with an empty LinkedList: Create a LinkedList without adding any elements. The code should print "The LinkedList is empty".
  • Test with a non-empty LinkedList: Create a LinkedList with some elements. The code should print "The LinkedList is not empty".
  • Test with different data types: Create a LinkedList of different data types (e.g., Int, Double, Boolean) and check if it is empty. The code should work correctly for all data types.

That's it! You have learned how to check if a LinkedList is empty in Kotlin. Feel free to modify the code according to your specific requirements.