.remove()

The .remove() method is used to remove a key-value pair from a HashMap in Kotlin.

fun <K, V> MutableMap<K, V>.remove(key: K): V?

It takes one parameter and returns:

• key: the key of the key-value pair to be removed
• V? : the value associated with the removed key or null if the key is not found in the map.

Here is an example of how to use the .remove() method in a Kotlin program:

fun main(){
  val myMap = hashMapOf("key1" to "value1", "key2" to "value2")
  val removedValue = myMap.remove("key1")
  print(myMap)
}

The output for the above code will be:

{key2=value2}