The setOf() method creates a new read-only set in Kotlin. A set cannot contain duplicate elements.
Kotlin setOf() Example
The example creates a new set with setOf(). The size of the set is determined with the size attribute.
package net.sourcecodeexamples.kotlin
fun main() {
// Set contains unique elements
val theSet = setOf("one", "two", "three", "one")
println(theSet)
println("The set contains ${theSet.size} elements.")
val theMutableOf = mutableSetOf("one", "two", "three")
println(theMutableOf)
}
Output:
[one, two, three]
The set contains 3 elements.
[one, two, three]
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