Kotlin Map containsValue()
Syntax & Examples

Syntax of Map.containsValue()

The syntax of Map.containsValue() function is:

abstract fun containsValue(value: V): Boolean

This containsValue() function of Map returns true if the map maps one or more keys to the specified value.

✐ Examples

1 Check if map contains the specified character value

In this example,

We create a map named map with integer keys and character values.
We use the containsValue() function to check if the map contains the value 'b'.
The result, which is true or false, is printed to standard output.

Kotlin Program

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

Output

true

2 Check if map contains the specified integer value

In this example,

We create a map named map with string keys and integer values.
We use the containsValue() function to check if the map contains the value 2.
The result, which is true or false, is printed to standard output.

Kotlin Program

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

Output

true

3 Print the result of containsValue for a specific value

In this example,

We create a map named map with integer keys and character values.
We directly print whether the map contains the value 'c' using string interpolation.
The result, which is true or false, is interpolated into the output string.

Kotlin Program

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

Output

Contains 'c': true

Summary

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