Kotlin Array - sliceArray() Function

The Kotlin array sliceArray() function is used to return a new array containing subset of element in the specified indices range. This function only slices an array not collection (list, hashSet).

The indices contain two parameters: startIndex, and endIndex.

Syntax

Following is the syntax of Kotlin array sliceArray() function −

fun <T> Array<T>.sliceArray(
   indices: Collection<Int>
): Array<T>

Parameters

This function accepts indices as a parameters represents startIndex and endIndex.

Return value

This function returns an array containing elements of this array at specified index range.

Example 1

The following is a basic example to demonstrate the use of sliceArray() function −

fun main(args: Array<String>){
   var arr = arrayOf<Int>(2, 4, 5, 6, 1).sliceArray(1 .. 3)
   
   println("The array after slice: ")
   // printing the slice array
   for (i in 0 until arr.size){
      println(arr.get(i))
   }
}

Output

The above code generate following output −

The array after slice: 
4
5
6

Example 2

Now, Let's see another example. Here, we create an array of string. We then use sliceArray() function to slice array's element in the specified indices range −

fun main(args: Array<String>){
   var elements = arrayOf<String>("tutorialspoint", "Hyderabad", "India", "tutorix").sliceArray(1..3)

   // printing the slice array
   println(elements.joinToString(prefix = "[", postfix="]"))
}

Output

Following is the output −

[Hyderabad, India, tutorix]

Example 3

The below example uses sliceArray() function to return an array containing weekdays −

fun main(args: Array<String>) {
   val daysOfWeek = arrayOf("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday")
    
   // Slice the array to get the weekdays
   val weekdays = daysOfWeek.sliceArray(1..5)
    
   println(weekdays.joinToString(prefix = "[", postfix = "]"))
}

Output

Following is the output −

[Monday, Tuesday, Wednesday, Thursday, Friday]