Question

How to iterate over map keys and values in Kotlin

Answer 1

fun main() {
    val map = mapOf("key1" to "value1", "key2" to "value2", "key3" to "value3")

    for ((key, value) in map) {
        println("Key: $key, Value: $value")
    }
}
   
      
/*
run:

Key: key1, Value: value1
Key: key2, Value: value2
Key: key3, Value: value3
  
*/

 

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Answer 2

fun main() {
    val map = mapOf("key1" to "value1", "key2" to "value2", "key3" to "value3")

    map.forEach { key, value -> println("$key -> $value") }
}
   
      
/*
run:

key1 -> value1
key2 -> value2
key3 -> value3
  
*/

 

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Answer 3

fun main() {
    val map = mapOf("key1" to "value1", "key2" to "value2", "key3" to "value3")

    map.entries.forEach { println("${it.key} ${it.value}") }
}
   
      
/*
run:

key1 value1
key2 value2
key3 value3
  
*/

 

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