Home » Scala

How to print an array in Scala?

By IncludeHelp Last updated : October 20, 2024

Array in Scala

In Scala, Array is a data structure that is a collection of elements of same data type.

Creating an array

The Array keyword is used to create an array in Scala. There are multiple syntaxes to create an array. They are,

var array_name : Array[data_type] = new Array[data_type(size) 
var array_name: Array[data_tpye] = new Array(size)
var array_name = new Array[data_type](size) 
var array_name = Array(element1, elmenet2, element3, ...)

All the four declarations are valid but the last two are commonly used.

Accessing an element from the array

To access the element of the array, its index is used.

Syntax

array_name[index]

Printing an Array

There are two methods to print all the elements of the array (print array):

1. Using iteration
2. Using string conversion

Printing elements of array using iteration

We can print the elements of the array by integrating over all the elements of the array and then printing each element using their index.

Syntax

for(i <- 0 to array_name.length-1)
  print(array_name[i])

Program to print array using iteration

object MyClass {
    def main(args: Array[String]) {
        var score = Array(97, 90, 89, 75, 45, 78, 99)   
        println("Elements of Array are : ")
        for(i <- 0 to score.length-1 )
            print(score(i) + " ")
    }
}

Output

Elements of Array are : 
97 90 89 75 45 78 99

Explanation

In the above code, we have created an array of integer values and then use the for loop to iterate over the elements of the array using the print statement.

Printing elements of the array using string conversion method

We can print array using the string conversion method, i.e. converting the array to a string using mkString() method.

Syntax

array_name.mkString(saperator)

Program to print array using string conversion method

object MyClass {
    def main(args: Array[String]) {
        var score = Array("C", "C++", "Java", "Python", "Scala")   
        var string = score.mkString(" , ")
        println("Elements of Array are :\n" + string)
    }
}

Output

Elements of Array are :
C , C++ , Java , Python , Scala

Explanation

In the above code, we have declared an array of strings. We have used the mkString() method to convert the array of string to string and then print it using the print statement.