Kotlin – Array length / size

Get length or size of an Array in Kotlin

To get the length or size of an Array in Kotlin, you can use Array.size property.

Array.size is a read-only property that returns the number of the elements in the Array.

The syntax to get the length or size of an Array arr is

arr.size

In the following program, we take an Arrays of strings: fruitNames. We use Array.size property to get the length of this Array.

Kotlin Program

fun main(args: Array<String>) {
    val fruitNames = arrayOf("apple", "banana", "cherry")
    val length = fruitNames.size
    println(length)
}

Output

There are three elements in the given Array.

In the following program, we take an empty Array and try to find its length. Since the Array is empty, size property must return 0. Let us check.

Kotlin Program

fun main(args: Array<String>) {
    val fruitNames = arrayOf<String>()
    val length = fruitNames.size
    println(length)
}

Output