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How to find the size of a HashSet in Kotlin

How to find the size of a HashSet in Kotlin.

Here's a step-by-step tutorial on how to find the size of a HashSet in Kotlin:

Step 1: Create a HashSet​

First, you need to create a HashSet in Kotlin. A HashSet is a collection that does not allow duplicate elements and does not maintain the order of elements. Here's an example of how to create a HashSet:

val hashSet = HashSet<String>()

In this example, we create a HashSet that stores String elements. You can replace "String" with any other data type you want to store in the HashSet.

Step 2: Add elements to the HashSet​

Next, you can add elements to the HashSet using the add() method. Here's an example:

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

In this example, we add three elements ("Apple", "Banana", and "Orange") to the HashSet.

Step 3: Find the size of the HashSet​

To find the size of the HashSet, you can use the size property. Here's an example:

val size = hashSet.size

In this example, we assign the size of the HashSet to the variable size. The size property returns the number of elements in the HashSet.

Step 4: Print the size of the HashSet​

Finally, you can print the size of the HashSet using the println() function. Here's an example:

println("Size of HashSet: $size")

In this example, we print the size of the HashSet using string interpolation. The $size expression is replaced with the value of the size variable.

Here's the complete code:

val hashSet = HashSet<String>()
hashSet.add("Apple")
hashSet.add("Banana")
hashSet.add("Orange")

val size = hashSet.size
println("Size of HashSet: $size")

When you run this code, it will output the size of the HashSet:

Size of HashSet: 3

That's it! You have successfully found the size of a HashSet in Kotlin.