Kotlin mutableSetOf()

In Kotlin, mutableSetOf() is a function that creates an empty or non-empty mutable set. In this tutorial, we'll discuss the syntax, example, output, explanation, use, important points, and summary of mutableSetOf().

Syntax

The syntax for creating a mutable set using mutableSetOf() is as follows:

mutableSetOf<dataType>()

Where dataType is the data type of the elements that you want to store in the set. You can also initialize the set with a set of elements:

mutableSetOf<dataType>(element1, element2, element3, ...)

Example

Here's an example of how to use mutableSetOf():

val mySet = mutableSetOf<String>()
mySet.add("apple")
mySet.add("banana")
mySet.add("orange")
println(mySet)

In this example, we first create an empty mutable set of strings called mySet. We then add three elements to the set using the add() method. Finally, we print the contents of the set using the println() function.

Output

When you run the above example, the output will be:

[apple, banana, orange]

Explanation

In Kotlin, mutableSetOf() function creates a mutable set of elements with the specified data type. Mutable sets are used to store unique elements that can be added or removed from the set.

The add() method is used to add an element to the set and the remove() method is used to remove an element from the set. You can also find the number of elements in the set using the size property.

Use

mutableSetOf() can be used to create and manipulate mutable sets of various data types, including strings, integers, and other objects. The function is frequently used in programs that require the storage and manipulation of unique elements.

Important Points

• mutableSetOf() creates a mutable set of elements with the specified data type.
• The add() method is used to add an element to the set and the remove() method is used to remove an element from the set.
• A mutable set can't contain duplicate elements.
• The size property is used to find the number of elements in the set.

Summary

In this tutorial, we've covered the syntax, example, output, explanation, use, important points, and summary of mutableSetOf(). With this knowledge, you can now create and manipulate mutable sets using Kotlin in your programs.