kalaiselvan369

fun main() {

    val n = 130

    if(n in 100..200)
        println("$n is a member of 100 to 200")

    inFloatRange(4.5)
}

kalaiselvan369

fun main() {
    var j = false
    for (i in 1..112) {
        if (i == 10) {
            println(true) 
            j = true // side effect
        }
    }
}

kalaiselvan369

fun main() {
    val dog = Dog()
    dog.bark()
}

// class is a user defined data type
class Dog {

    // characteristics/properties of a class
    val legs: Int = 4

kalaiselvan369

fun main() {
    // constructor is a special type of member function that instantiate the class
    val elephant = Elephant()
    println(elephant)

    val employee = Employee("Ram")
    println(employee)

    val student = Student("Arun")
    println(student.toString())

kalaiselvan369

// top level private property
private var score = 0

// top level private class
private class Batsman() {
    fun hitSix() = 6
}

// top level private function
private fun recordScore(run: Int) {

kalaiselvan369

package api


// since the class is declared as internal, it is accessible to all the packages 
// that are declared inside the same module.
internal class ApiClient

kalaiselvan369

class User {

    private var userName: String? = null // not accessible outside the class
    private var password: String? = null // not accessible outside the class

    val displayName: String = "Joey" // accessible outside the class

    private val messages = mutableListOf<String>()

    private fun resetPassword() {

kalaiselvan369

fun main() {

    val car = Car()
    // although it is protected inside vehicle class while overriding it 
    // in the subclass we marked as public hence it is accessbile
    car.start()

    //car.engineStart() // not accessible since it is protected inside the car class
}

kalaiselvan369

fun main() {
  
  // we use parameter name while passing arguments to a function. 
  loadNextPage(page = 1, itemsPerPage = 10)
}


// itemsPerPage parameter by default has its value as 20
fun loadNextPage(page: Int, itemsPerPage: Int = 20) {

kalaiselvan369

fun main() {

    // various string template options
    val n = 10
    println("value is $n")

    val message = "The value is $n"
    println(message)

    val result = "The multiple is ${n * 8}"