How to Convert a List of Strings to a List of Integers in Kotlin - Step by Step Examples

How to Convert a List of Strings to a List of Integers in Kotlin ?

Answer

To convert a list of strings to a list of integers in Kotlin, you can use the map function along with the toIntOrNull function to transform each string to its integer representation.

✐ Examples

1 Convert List of Strings to List of Integers

In this example,

We have a list of strings named stringList.
We use the map() function to apply a transformation to each string in the list.
Inside the map function, we use the toIntOrNull() function to convert each string to its integer representation.
The result is a list of integers.

Kotlin Program

fun main() {
    val stringList = listOf("1", "2", "3", "4", "5")
    val intList = stringList.map { it.toIntOrNull() }
                              .filterNotNull()
    println("List of integers: $intList")
}

Output

List of integers: [1, 2, 3, 4, 5]

Summary

In this tutorial, we learned How to Convert a List of Strings to a List of Integers in Kotlin language with well detailed examples.

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