Convert a string to a character array in Kotlin

This article explores different ways to convert a string to a character array in Kotlin.

1. Using `toCharArray()` function

The standard solution to convert a string to a character array is with the toCharArray() function.

fun toCharacterArray(str: String): CharArray {

return str.toCharArray()

}

fun main() {

val str = "KOTLIN"

val chars: CharArray = toCharacterArray(str)

println(chars.contentToString()) // [K, O, T, L, I, N]

}

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The toCharArray() function returns a CharArray containing characters in the string. If you need a typed array, make an extra call to the toTypedArray() function.

fun toCharacterArray(str: String): Array<Char> {

return str.toCharArray().toTypedArray()

}

fun main() {

val str = "KOTLIN"

val chars: Array<Char> = toCharacterArray(str)

println(chars.contentToString()) // [K, O, T, L, I, N]

}

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2. Using for loop

You can also use a for-loop to read the characters in the string and assign them to a Char Array.

fun toCharacterArray(str: String): Array<Char?> {

val chars = arrayOfNulls<Char>(str.length)

for (i in str.indices) chars[i] = str[i]

return chars

}

fun main() {

val str = "KOTLIN"

val chars = toCharacterArray(str)

println(chars.contentToString()) // [K, O, T, L, I, N]

}

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That’s all about converting a string to the Character array in Kotlin.

Convert a string to a character array in Kotlin

1. Using toCharArray() function

2. Using for loop

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1. Using `toCharArray()` function