Kotlin Tutorials

Kotlin Map values
Syntax & Examples

Syntax of Map.values

The syntax of Map.values property is:

abstract val values: Collection<V>

This values property of Map returns a read-only Collection of all values in this map. Note that this collection may contain duplicate values.


✐ Examples

1 Get values of a map with integer keys and character values

In this example,

  • We create a map named map with integer keys and character values.
  • We access the values property of the map to get a read-only Collection of values.
  • We then print the values to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val map = mapOf(1 to 'a', 2 to 'b', 3 to 'c')
    val values = map.values
    println(values)
}

Output

[a, b, c]

2 Get values of a map with string keys and integer values

In this example,

  • We create a map named map with string keys and integer values.
  • We access the values property of the map to get a read-only Collection of values.
  • We then print the values to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val map = mapOf("apple" to 1, "banana" to 2, "cherry" to 3)
    val values = map.values
    println(values)
}

Output

[1, 2, 3]

3 Print values of a map using a loop

In this example,

  • We create a map named map with integer keys and character values.
  • We use a for loop to iterate over each value in map.values.
  • We print each value to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val map = mapOf(1 to 'a', 2 to 'b', 3 to 'c')
    for (value in map.values) {
        println(value)
    }
}

Output

a
b
c

Summary

In this Kotlin tutorial, we learned about values property of Map: the syntax and few working examples with output and detailed explanation for each example.