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Scala program to merge two sets using the ++ operator

Here, we are going to learn how to merge two sets using the ++ operator in Scala programming language?
Submitted by Nidhi, on June 26, 2021 [Last updated : March 11, 2023]

Merge Two Scala Sets (Using ++ Operator)

Here, we will create two sets using the Set collection class. Then we will merge both sets using the "++" operator and print the result on the console screen.

Scala code to merge two sets using the ++ operator

The source code to merge two sets using the "++" operator is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to merge two sets 
// using "++" operator

import scala.collection.immutable._

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

    // Set of cities.
    val cities = Set("DELHI", "MUMBAI", "AGRA", "GWALIOR")

    val mergeSet = cities ++ luckyNums;

    println(mergeSet);
  }
}

Output

HashSet(AGRA, 10, 20, GWALIOR, 30, MUMBAI, DELHI)

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 two sets luckyNums, and cities. Then we merged both sets using the "++" operator and printed the result on the console screen.

Scala Set Programs »

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