Using the 'contains' Function for Membership Testing

The 'contains' function in Kotlin is a convenient way to check if a collection includes a specific element. This can be particularly useful when you need to validate input, filter data, or check conditions before performing operations. It enhances code readability and efficiency by utilizing Kotlin's expressive syntax.

val numbers = listOf(1, 2, 3, 4, 5)
val containsThree = numbers.contains(3)

if (containsThree) {
    println("The list contains the number 3.")
} else {
    println("The list does not contain the number 3.")
}