arsalankhan994

fun main() {
    val methodInKotlin = MethodInKotlin()
    methodInKotlin.methodWithoutReturnTypeAndNoParameter()
    val first = methodInKotlin.methodWithReturnTypeAndNoParameter()
    println("return type of methodWithReturnTypeAndNoParameter: $first")
    methodInKotlin.methodWithoutReturnTypeWithParameter("Erselan Khan")
    val second = methodInKotlin.methodWithReturnTypeWithParameter("Erselan Khan")
    println("return type of methodWithReturnTypeWithParameter: $second")
}

arsalankhan994

fun main() {

    // Type Checking
    // Initializing list with String, Int and Boolean value
    val list = listOf<Any>("Erselan Khan", 21, false)

    // loop on above list
    list.forEach {
        when(it) {
            is String -> println("String value is: $it")

arsalankhan994

fun main() {

    // Smart Casting
    var studentWithRealObject: Any? = Student()

    if (studentWithRealObject is Student) {
        println("Student name: ${studentWithRealObject.name}")
        println("Student age: ${studentWithRealObject.age}")
    }

arsalankhan994

fun main() {

    // Non changeable values in Kotlin
    val personAge = 27
    /*personAge = 26*/ // we can not reassign value to val variable

    // Changeable values in Kotlin
    var name = "Erselan Khan"
    name = "Khan Erselan"

arsalankhan994

main() {
  
    /*
    object classes example
    */
    val singleton = SingletonClass.age
    println(singleton)
    SingletonClass.updateAge(20)
    println(SingletonClass.age)
    

arsalankhan994

/*
Using open keyword to inherit this class
*/
open class InheritableClass {

}

/*
Try to Inherit inheritable class
*/

arsalankhan994

// we don't need to add open keyword

abstract class AbstractClasses() {
    abstract fun someAbstractMethod()
}

class SomeClassName: AbstractClasses() {
    override fun someAbstractMethod() {

    }

arsalankhan994

fun main() {

    // Multi Condition in Kotlin using when/else
  
    val list = listOf("Erselan Khan", 27, "arsalankhan994@gmail.com")
    
    when(list[(list.indices).random()]) {
        "Erselan Khan" -> println("name is ${list[0]}")
        27 -> println("age is ${list[1]}")
        "arsalankhan994@gmail.com" -> println("email is ${list[2]}")

arsalankhan994

main() {
    /*
    Data class example
    */
    val dataClass = StudentDataClass()
    dataClass.copy()
    dataClass.toString()
}

/*

arsalankhan994

main() {
  
    /*
    Class bound methods and variable
    */
    val someVariable = ClassBoundMethod
    someVariable.classBoundMethod()
    someVariable.name
  
}