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Scala program to add and remove elements from the set collection

Here, we are going to learn how to add and remove elements from the set collection in Scala programming language?
Submitted by Nidhi, on June 26, 2021 [Last updated : March 11, 2023]

Scala - Add/Remove Elements in/from a Set

Here, we will create a set of integer numbers using the Set collection class. Then we will add and remove the item from created set using the "+=" and "-=" operator and then print the result on the console screen.

Scala code to add/remove elements in/from a set

The source code to add and remove elements from the set collection is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to add and remove elements from set

import scala.collection.immutable._

object Sample {
  // Main method
  def main(args: Array[String]) {
    var numbers = Set(10, 20, 30, 40, 50);

    println(numbers);

    // Add item to the set collection.
    numbers += 60;
    println(numbers);

    // Remove item from the set collection.
    numbers -= 40;
    println(numbers);
  }
}

Output

HashSet(10, 20, 50, 40, 30)
HashSet(10, 20, 60, 50, 40, 30)
HashSet(10, 20, 60, 50, 30)

Explanation

Here, we used an object-oriented approach to create the program. And, we imported Collection classes using below statement,

import scala.collection.immutable._

Here, we also created a singleton object Sample and defined the main() function. The main() function is the entry point for the program.

In the main() function, we created a set of numbers using the Set collection class. Then we added and removed the item from the numbers set collection using the "+=" and "-=" operators and printed the result on the console screen.

Scala Set Programs »

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