How to Rotate Elements in an Array in Kotlin - Step by Step Examples

How to Rotate Elements in an Array in Kotlin ?

Answer

To rotate elements in an array in Kotlin, you can use a combination of array slicing and array concatenation to shift elements to the left or right.

✐ Examples

1 Rotate Array to the Right by One Position

In this example,

We create an array named array with integer values.
We use the sliceArray method to extract the last element of the array.
We use the sliceArray method again to extract all elements except the last one.
We concatenate the two slices to form the rotated array.
Finally, we print the rotated array to verify the rotation.

Kotlin Program

fun main() {
    val array = arrayOf(1, 2, 3, 4, 5)
    val rotatedArray = arrayOf(array.last()) + array.sliceArray(0 until array.size - 1)
    println("Original Array: ${array.joinToString()}")
    println("Rotated Array: ${rotatedArray.joinToString()}")
}

Output

Original Array: 1, 2, 3, 4, 5
Rotated Array: 5, 1, 2, 3, 4

2 Rotate Array to the Left by One Position

In this example,

We create an array named array with string values.
We use the sliceArray method to extract all elements except the first one.
We use the sliceArray method again to extract the first element of the array.
We concatenate the two slices to form the rotated array.
Finally, we print the rotated array to verify the rotation.

Kotlin Program

fun main() {
    val array = arrayOf("a", "b", "c", "d", "e")
    val rotatedArray = array.sliceArray(1 until array.size) + arrayOf(array.first())
    println("Original Array: ${array.joinToString()}")
    println("Rotated Array: ${rotatedArray.joinToString()}")
}

Output

Original Array: a, b, c, d, e
Rotated Array: b, c, d, e, a

Summary

In this tutorial, we learned How to Rotate Elements in an Array in Kotlin language with well detailed examples.

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How to Rotate Elements in an Array in Kotlin - Step by Step Examples

How to Rotate Elements in an Array in Kotlin ?

Answer

✐ Examples

1 Rotate Array to the Right by One Position

Kotlin Program

Output

2 Rotate Array to the Left by One Position

Kotlin Program

Output

Summary

More Kotlin Arrays Tutorials