Mis on in operaatori eesmärk programmeerimises?

In programming, the in operator is commonly used to check if an element belongs to a collection or range. For example, in Kotlin (often used in Android development), the in operator checks whether an element is within a range or collection:

val x = 5
if (x in 1..10) {
    println("Number $x is in the range from 1 to 10")
}

Here, x in 1..10 checks whether the value of x is included in the range from 1 to 10, inclusive. Similarly, in can be used to check if an element exists in a list or array.