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Scala program to add elements to the Map collection

Here, we are going to learn how to add elements to the Map collection in Scala programming language?
Submitted by Nidhi, on June 10, 2021 [Last updated : March 11, 2023]

Scala - Adding Elements to Map

Here, we will create a map using Map collection. The Map collection is used to store key/value pairs and then we will add elements to the created Map collection using the "+" operator and printed elements on the console screen.

Scala code to add elements to the Map collection

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

// Scala program to add elements to the 
// Map collection

object Sample {
  // Main method
  def main(args: Array[String]) {
    var students = Map((101, "Amit"), (102, "Arun"), (103, "Anit"))

    println("Student Information:");
    for ((stuId, stuName) <- students)
      printf("\tId: %d, Name: %s\n", stuId, stuName);

    students = students + (104 -> "Sumit")
    students = students + (105 -> "Kishan")

    println("Student Information After adding elements:");
    for ((stuId, stuName) <- students)
      printf("\tId: %d, Name: %s\n", stuId, stuName);
  }
}

Output

Student Information:
	Id: 101, Name: Amit
	Id: 102, Name: Arun
	Id: 103, Name: Anit
Student Information After adding elements:
	Id: 101, Name: Amit
	Id: 102, Name: Arun
	Id: 105, Name: Kishan
	Id: 103, Name: Anit
	Id: 104, Name: Sumit

Explanation

Here, we used an object-oriented approach to create the program. And, 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 map of students. The students map contains the student id and student name. Then we added two elements to the students Map collection. After that, we printed the elements on the console screen.

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