In this tutorial, you shall learn how to iterate over the elements of a given array using For loop in Kotlin, with examples.

Kotlin Array – For Loop

To iterate over elements of an Array in Kotlin, we can use For Loop. Inside the For Loop body, we can access respective element of the iteration.

Refer Kotlin For Loop tutorial.

Syntax

The syntax to iterate over elements of an Array arr using For Loop is

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for (element in arr) {
    //code
}

The syntax to iterate over indices of an Array arr using For Loop is

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for (index in arr.indices) {
    //code
}

The syntax to iterate over indices and elements of an Array arr using For Loop is

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for ((index, element) in arr.withIndex()) {
    //code
}

Examples

1. Iterate over elements of an array

In the following program, we take an array of strings, and iterate over the elements of this Array. Inside For Loop, we print the element.

Main.kt

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fun main(args: Array<String>) {
    val arr = arrayOf("apple", "banana", "cherry")
    for (x in arr) {
        println(x)
    }
}

Output

apple
banana
cherry

2. Iterate over the indices of an array

In the following program, we take an array of strings, and iterate over the indices of this Array. Inside For Loop, we print the respective element.

Main.kt

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fun main(args: Array<String>) {
    val arr = arrayOf("apple", "banana", "cherry")
    for (i in arr.indices) {
        println(arr[i])
    }
}

Output

apple
banana
cherry

3. Access index of the element in the For loop

In the following program, we take an array of strings, and iterate over the indices and elements of this Array. Inside For Loop, we print the index and respective element.

Main.kt

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fun main(args: Array<String>) {
    val arr = arrayOf("apple", "banana", "cherry")
    for ((index, element) in arr.withIndex()) {
        println("[$index] - $element")
    }
}

Output

[0] - apple
[1] - banana
[2] - cherry

Conclusion

In this Kotlin Tutorial, we learned how to iterate over elements of an Array using For Loop, in Kotlin programming language with examples.