Kotlin setOf()

In Kotlin, setOf() is a function that is used to create a set containing the elements passed to it as arguments. In this tutorial, we'll take a closer look at how to use setOf() in Kotlin.

Syntax

The setOf() function takes one or more elements as arguments and returns a set containing those elements. Here's the syntax:

setOf(element1, element2, ..., elementN)

Example

Let's look at an example to see how setOf() works:

val set = setOf("apple", "banana", "orange")
println(set)

Output:

[apple, banana, orange]

Explanation

In the example above, we've created a set containing the elements "apple", "banana", and "orange" using the setOf() function. We then print out the contents of the set using the println() function.

A set is a collection that contains no duplicate elements. When we create a set using setOf(), Kotlin takes care of removing any duplicate elements that we may have passed to the function.

Use

The setOf() function can be useful when you want to create a set containing a few elements. Sets can be useful for storing unique elements and performing set operations such as union, intersection, and difference.

Important Points

• The setOf() function returns an immutable set. If you want to create a mutable set, use the mutableSetOf() function instead.
• If you want to create a set with initial values that are mutable, use the HashSet() constructor instead of setOf().
• When you create a set using setOf(), the elements are ordered according to their natural order.

Summary

In this tutorial, we discussed setOf() function in Kotlin. We looked at the syntax, example, output, explanation, use, and important points related to this function. We hope this has been a helpful introduction to using sets in Kotlin with setOf().