KOTLIN - JOIN TWO SETS

How to extend an existing Set or join two Sets?

Let us say, we have a Set that contains three names, Mohan, Kriti and Salim. And we want to insert a new Set with two names Sia and Andrew at the end of the Set.

There are two ways by which we can join or extend Set.

By using the + operator
Using the addAll() Function

At first let us see the Joining of two Sets using + operator.

Example :

fun main() {
    var x = mutableSetOf("Mohan", "Kriti", "Salim")
    var y = mutableSetOf("Sia", "Andrew")
    var z = x + y
    println(z)
}

Output :

[Mohan, Kriti, Salim, Sia, Andrew]

So, in the above code we have created a Set and initialised to the variable x.

var x = mutableSetOf("Mohan", "Kriti", "Salim")

Below is how the values are positioned in the Set,

Also we have another Set that contains, Sia and Andrew.

	var y = mutableSetOf("Sia", "Andrew")

Next, we have used the + operator to add the the Sets x and y.

var z = x + y

And the Sets x and yis joined and initialised to a new Set z.

And we get the below output,

[Mohan, Kriti, Salim, Sia, Andrew]

Let us rewrite the same example using the addAll() Function.

Example :

fun main() {
    var x = mutableSetOf("Mohan", "Kriti", "Salim")
    var y = mutableSetOf("Sia", "Andrew")
    x.addAll(y)
    println(x)
}

Output :

[Mohan, Kriti, Salim, Sia, Andrew]

So, in the above code we have created a Set and initialised to the variable x.

var x = mutableSetOf("Mohan", "Kriti", "Salim")

Below is how the values are positioned in the Set,

Also we have another Set that contains, Sia and Andrew.

	var y = mutableSetOf("Sia", "Andrew")

Next, we have used the addAll() function to add the new Set y that contains Sia and Andrew at the end of the Set x.

x.addAll(y)

And the Set y is joined with x.

And we get the below output,

[Mohan, Kriti, Salim, Sia, Andrew]

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KOTLIN - JOIN TWO SETS

How to extend an existing Set or join two Sets?

By using the + operator

Using the addAll() Function

Example :

Output :

Example :

Output :