Milliseid Kotlin keele võimalusi sooviksite näha…

Extending functions: Allow adding new functions to existing classes without inheritance or decorator patterns. Improves code readability and organization.
Null-safety (null-beskyttelse): A type system that clearly distinguishes nullable and non-nullable types, preventing NullPointerException errors at compile time.
Data classes: Simplified creation of classes for storing data with automatic generation of equals(), hashCode(), toString(), copy().
```
data class User(val name: String, val age: Int)
```
Expressions while and when: when — powerful replacement for switch with support for various conditions (types, ranges, boolean conditions), while can be an expression returning the value of the last executed condition.
```
val result = when (x) {
    1 -> "one"
    in 2..10 -> "from two to ten"
    is String -> "string"
    else -> "something else"
}
```
Coroutines: Lightweight threads that facilitate asynchronous and non-blocking programming. Integrated at the language level.

Named and optional arguments: Improve code readability when calling functions and allow skipping optional parameters.

fun greet(name: String, greeting: String = "Hello") {
    println("$greeting, $name!")
}

greet(name = "World") // Using default optional argument
greet(name = "World", greeting = "Hi") // Overriding optional argument

Smart casts: The compiler automatically determines the type of a variable after a condition check (e.g., is), allowing access to members of that type without explicit casting.

fun printLength(obj: Any) {
    if (obj is String) {
        // Now obj is automatically considered a String
        println("String length: ${obj.length}")
    }
}

Type inference: The compiler can often determine the type of a variable on its own, reducing redundancy.

val number = 42 // Kotlin infers this is an Int
val message = "Hello" // Kotlin infers this is a String

Lambda expressions with implicit it parameter: Convenient for simple lambdas with one parameter.
```
val list = listOf(1, 2, 3)
list.forEach { println(it) } // it - the list element
```

Milliseid Kotlin keele võimalusi sooviksite näha teistes programmeerimiskeeltes?