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Scala program to print the first element of a sequence without using the index

Here, we are going to learn how to print the first element of a sequence without using the index in Scala programming language?
Submitted by Nidhi, on June 03, 2021 [Last updated : March 11, 2023]

Scala - First Sequence Element without using Index

Here, we will create a sequence of integer numbers using Seq collection class. Then we will get the first element of a sequence using the head property and print the result on the console screen.

The Seq is a trait. It is used to represent the indexed sequence. It is immutable. It also maintains the insertion order of elements.

Scala code to print the first element of a sequence without using the index

The source code to print the first element of a sequence without using the index is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to print the first element
// of a sequence without using index

import scala.collection.immutable._

object Sample {
  // Main method
  def main(args: Array[String]) {
    var nums: Seq[Int] = Seq(10, 20, 30, 20, 56, 67, 78);

    println("First element: " + nums.head);
  }
}

Output

First element: 10

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 sequence nums using Seq collection. Then we got the first element of the created sequence using the head property and printed the result on the console screen.

Scala Sequence Programs »

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