Kotlin – Check if element is in Array

Check if “banana” is in the Array

In the following program, we take an Array of strings: fruitNames. We use in operator to check if the element "banana" is in this Array.

Kotlin Program

fun main(args: Array<String>) {
    val fruitNames = arrayOf("apple", "banana", "cherry")
    if ("banana" in fruitNames) {
        println("The element is in array.")
    } else {
        println("The element is not in array.")
    }
}

Output

The element is in array.

Negative Scenario

Let us now take an element that is not in the Array, and programmatically check that.

Kotlin Program

fun main(args: Array<String>) {
    val fruitNames = arrayOf("apple", "banana", "cherry")
    if ("mango" in fruitNames) {
        println("The element is in array.")
    } else {
        println("The element is not in array.")
    }
}

Output

The element is not in array.

We can also store the element in a variable, and form the condition, as shown in the following program.

Kotlin Program

fun main(args: Array<String>) {
    val fruitNames = arrayOf("apple", "banana", "cherry")
    val searchValue = "banana"
    if (searchValue in fruitNames) {
        println("The element is in array.")
    } else {
        println("The element is not in array.")
    }
}

Output

The element is in array.