Ayeeta

val area = {l: Int, w: Int -> l * w}
println(area(6,4))
    
val areaOption :(Int, Int) -> Int = {l, w -> l*w}
println(areaOption(6,4))

Ayeeta

open class Car(val make: String, val model: String, val engineSize: String){
  open fun accelerate(){
    println("vroom vroom")
  }
  
  fun brake(){
    println("STOP")
  }
  
  fun reverse(){

Ayeeta

var nullable : String? = null
println(nullable?.length)
 
var notNullableExample : String = "something"!!
println(notNullableExample)

Ayeeta

/**
Immutable hash map/dictionary
**/ 
val contacts = mapOf("Tom" to "0780","Peter" to "4784","Derrick" to "6780" )
println(contacts)
println(contacts["Tom"])
println(contacts.get("Peter"))
println(contacts.values)
    
/**

Ayeeta

/**
Mutable lists/arrays use arrayListOf() method
Notice it has other methods to add to the list 
**/

val mutableAlphabetsLists = arrayListOf("c","d","b","a")
println(mutableAlphabetsLists)
println(mutableAlphabetsLists.size)
println(mutableAlphabetsLists.add("x"))
println(mutableAlphabetsLists)

Ayeeta

/**
Immutable lists/arrays uses the listOf() method
together with a few methods for operations on lists/arrays
**/
val alphabets = listOf("c","d","b","a")
println(alphabets)
println(alphabets.sorted())
println(alphabets[2])
println(alphabets.contains("b"))
println(alphabets.last())

Ayeeta

var x = 1
when (x){
   1 ->println("x is 1") 
   else -> println("x is not equal to 1")
}

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//Example with no args
fun exampleFunction(){
  println("This is an example of a function in Kotlin")
}

//Example with Args. Remember the data types are declared explicitly
fun exampleFunctionWithArgs(someString:String){
  println(someString)
}

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val a  = 3
val b = 2.4
println(a + b)
println(a / b)
println(a * b)
println(a % b)

Ayeeta

//Escaped strings, means you can use escaped characters

val escapedString = "Kotlin is fun because Zombie said \"Kotlin is ...\" "

println(escapedString)

/**
output - Kotlin is fun because Zombie said "Kotlin is ..."
Here's a ist of escape characters you could use
    \t - Inserts tab