Convert an IntArray to a String in Kotlin

This article explores different ways to convert an IntArray to a String in Kotlin.

1. Using `reduce()` function

The idea is to map each element of the IntArray to a String and perform a reduction operation on elements using the reduce() function. This can be implemented as follows in Kotlin.

fun main() {

val intArray: IntArray = intArrayOf(1, 2, 3, 4, 5)

val str: String = intArray.map { it.toString() }.reduce { x, y -> "$x, $y" }

println(str)

}

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Output:

1, 2, 3, 4, 5

2. Using `contentToString()` function

To print the string representation of the contents of an IntArray, use the contentToString() function. The string representation consists of all elements of the array enclosed within [] and the adjacent elements separated by ", ".

fun main() {

val intArray: IntArray = intArrayOf(1, 2, 3, 4, 5)

println(intArray.contentToString())

}

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Output:

[1, 2, 3, 4, 5]

To remove [ and ] from the string representation, use the replaceAll() function.

fun main() {

val intArray: IntArray = intArrayOf(1, 2, 3, 4, 5)

val str: String = intArray.contentToString().replace("[\\[\\]]".toRegex(), "")

println(str)

}

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Output:

1, 2, 3, 4, 5

3. Using Loop

The idea here is to create a new string and concatenate each array element to it, separated by ", ".

fun getString(intArray: IntArray?): String {

if (intArray == null || intArray.isEmpty()) {

return ""

}

var str = intArray[0].toString()

for (i in 1 until intArray.size) {

str = str + ", " + intArray[i].toString()

}

return str

}

fun main() {

val intArray: IntArray = intArrayOf(1, 2, 3, 4, 5)

val str: String = getString(intArray)

println(str)

}

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Output:

1, 2, 3, 4, 5

That’s all about converting an IntArray to a String in Kotlin.

Convert an IntArray to a String in Kotlin

1. Using reduce() function

2. Using contentToString() function

3. Using Loop

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1. Using `reduce()` function

2. Using `contentToString()` function