How to Iterate Over an Array in Reverse Order in Kotlin

How to Iterate Over an Array in Reverse Order in Kotlin ?

Answer

To iterate over an array in reverse order in Kotlin, you can use the reversedArray() method or a simple loop starting from the last index to the first index.

✐ Examples

1 Iterate Over an Array in Reverse Order using reversedArray() Method

In this example,

We create an array named numbers with integer values.
We use the reversedArray() method to get a reversed view of the array.
We iterate through the reversed array using a for loop.
Inside the loop, we print each element to standard output.

Kotlin Program

fun main() {
    val numbers = arrayOf(1, 2, 3, 4, 5)
    val reversedNumbers = numbers.reversedArray()
    for (num in reversedNumbers) {
        println(num)
    }
}

Output

2 Iterate Over an Array in Reverse Order using a Simple Loop

In this example,

We create an array named fruits with string values.
We initialize a variable i with the last index of the array.
We start a while loop with the condition i >= 0 to iterate from the last index to the first index.
Inside the loop, we print each element using fruits[i] and decrement i.

Kotlin Program

fun main() {
    val fruits = arrayOf("Apple", "Banana", "Cherry", "Date")
    var i = fruits.size - 1
    while (i >= 0) {
        println(fruits[i])
        i--
    }
}

Output

Date
Cherry
Banana
Apple

Summary

In this tutorial, we learned How to Iterate Over an Array in Reverse Order in Kotlin language with well detailed examples.

◀ Previous Next ▶

Kotlin Tutorials

Kotlin How-Tos

How to Iterate Over an Array in Reverse Order in Kotlin

How to Iterate Over an Array in Reverse Order in Kotlin ?

Answer

✐ Examples

1 Iterate Over an Array in Reverse Order using reversedArray() Method

Kotlin Program

Output

2 Iterate Over an Array in Reverse Order using a Simple Loop

Kotlin Program

Output

Summary

More Kotlin Arrays Tutorials