kotlin-stdlib/kotlin.collections/AbstractMutableSet/size

size

expect abstract override val size: Int(source)

Returns the size of the collection.

If a collection contains more than Int.MAX_VALUE elements, the value of this property is unspecified. For implementations allowing to have more than Int.MAX_VALUE elements, it is recommended to explicitly document behavior of this property.

Since Kotlin

1.3

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   assertEquals(3, listOf(1, 2, 3).size)
assertEquals(0, emptySet<Int>().size)
assertEquals(2, mapOf(1 to "one", 2 to "two").size) 
   //sampleEnd
}