Kotlin basics

Kotlin tutorial :-

Extraordinary Features :-

Support Null Pointer Exception

Support Immutability

Basic Program :-

fun main (args : Array<String>) {

println("Hello World")

}

Comment :-

//This is inline comment

/* multiple line comment 1

    multiple line comment 2  */

Variable :-

var  -  mutable

val - Immutable

String Interpolation :-

class person { }

main()

{ 

var personobj = person()

//String Interpolation

println("name of person ${personobj.name}")

}

Datatypes:-

var age : Int = 10

//age  =  variable names

//Int = data type

1. Numbers – Byte, Short, Int, Long, Float, Double
2. Boolean – True, false
3. Characters
4. Arrays
5. Strings

//Depends upon the Size

String Interpolation :-    (More Example)

eg-1

val  a = 20

val b = 10

println("Sum ${a+b}")

eg-2

class rectangle {

rec.len : Int = 0

rec.bre : Int = 0 }

main()

var rec=rectangle()

rec.len = 5

rec.bre =9

println("lenght of rectangle is ${rec.len} and breadth of rectangle is ${rec.bre}

              and Area is ${rec.len * rec.bre})