How to create a Two Dimensional List in Kotlin - Step by Step Examples

How to create a Two Dimensional List in Kotlin ?

Answer

To create a Two-Dimensional List in Kotlin, you can use MutableList or List and initialize it with MutableLists or Lists to represent rows and columns.

✐ Examples

1 Create a 2D List of Strings

In this example,

We create a new MutableList named matrix to represent the 2D list.
Within a loop, we initialize each row of the matrix as a new MutableList.
We add elements to each row to represent the columns.
Finally, we print the 2D list to the console.

Kotlin Program

fun main() {
    val matrix = mutableListOf<MutableList<String>>()
    for (i in 0 until 3) {
        matrix.add(mutableListOf())
        for (j in 0 until 3) {
            matrix[i].add("Element $i$j")
        }
    }
    println(matrix)
}

Output

[[Element 00, Element 01, Element 02], [Element 10, Element 11, Element 12], [Element 20, Element 21, Element 22]]

2 Create a 2D List of Integers

In this example,

We create a new MutableList named matrix to represent the 2D list.
Within nested loops, we initialize each element of the matrix with an integer value.
We print the 2D list to the console.

Kotlin Program

fun main() {
    val matrix = mutableListOf<MutableList<Int>>()
    for (i in 0 until 3) {
        matrix.add(mutableListOf())
        for (j in 0 until 3) {
            matrix[i].add(i * 3 + j)
        }
    }
    println(matrix)
}

Output

[[0, 1, 2], [3, 4, 5], [6, 7, 8]]

Summary

In this tutorial, we learned How to create a Two Dimensional List in Kotlin language with well detailed examples.

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How to create a Two Dimensional List in Kotlin - Step by Step Examples

How to create a Two Dimensional List in Kotlin ?

Answer

✐ Examples

1 Create a 2D List of Strings

Kotlin Program

Output

2 Create a 2D List of Integers

Kotlin Program

Output

Summary

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