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How to print all the elements of a String array in Kotlin in a single line?
In this article, we will take an example and show how to print all the elements of a String array in a single line using a Kotlin library class. In order to do that, we will use a String function called joinToString(), provided by the Kotlin library.
As per the Kotlin documentation, the function definition looks like this −
fun <T> Array<out T>.joinToString( // the String will be separated by this separator: CharSequence = ", ", // This will be added as prefix to the String prefix: CharSequence = "", // This will be added as postfix to the String postfix: CharSequence = "", // This number of element will be printed, // the remaining elements will be denoted but truncated sequence limit: Int = -1, truncated: CharSequence = "...", //any transformation required over the String transform: ((T) -> CharSequence)? = null ): String
This function takes several attributes in order to convert an arrayList into a String.
Example - Printing all elements of a String array in a single line
fun main(args: Array<String>) {
val mylist = listOf("Jam", "bread", "apple", "mango")
println(
mylist.joinToString(
prefix = "[",
separator = "-",
postfix = "]",
truncated = "...",
)
)
}Output
On execution, it will produce the following output −
[Jam-bread-apple-mango]
Updated on: 01-Mar-2022
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