.put()

In Kotlin, the .put() method is used to add a key-value pair to a hash map. It is a member function of the MutableMap interface, which means it can be called on any object that implements this interface, such as a HashMap or LinkedHashMap.

myHashMap.put(key, value)

It takes in two parameters:

• The key of the key-value pair to add or update in the hash map.
• The value of the key-value pair to add or update in the hash map.

To add a key-value pair to a HashMap in Kotlin, the .put() method can be used:

fun main() {
  val map = HashMap<String, Int>()

  map.put("apple", 1)
  map.put("banana", 2)
  map.put("cherry", 3)

  println(map)
}

This will output:

{banana=2, apple=1, cherry=3}