Kotlin Tutoial

• Introduction to Kotlin
• Kotlin Environment setup for Command Line
• Kotlin Environment setup with Intellij IDEA
• Hello World program in Kotlin

Basics

• Kotlin Data Types
• Kotlin Variables
• Kotlin Operators
• Kotlin Standard Input/Output
• Kotlin Type Conversion
• Kotlin Expression, Statement and Block

Control Flow

• Kotlin if-else expression
• Kotlin while loop
• Kotlin do-while loop
• Kotlin for loop
• Kotlin when expression
• Kotlin Unlabeled break
• Kotlin labeled break
• Kotlin unlabeled continue
• Kotlin labeled continue

Array & String

• Kotlin Array
• Kotlin String

Functions

• Kotlin functions
• Kotlin | Default and Named argument
• Kotlin Recursion
• Kotlin Tail Recursion
• Lambdas Expressions and Anonymous Functions
• Kotlin Inline functions
• Kotlin infix function notation
• Kotlin Higher-Order Functions

Collections

• Kotlin Collections
• Kotlin list : Arraylist
• Kotlin list : listOf()
• Kotlin Set : setOf()
• Kotlin mutableSetOf()
• Kotlin hashSetOf()
• Kotlin Map : mapOf()
• Kotlin Hashmap

OOPs Concept

• Kotlin Class and Objects
• Kotlin Nested class and Inner class
• Kotlin Setters and Getters
• Kotlin | Class Properties and Custom Accessors
• Kotlin Constructor
• Kotlin Visibility Modifiers
• Kotlin Inheritance
• Kotlin Interfaces
• Kotlin Data Classes
• Kotlin Sealed Classes
• Kotlin Abstract class
• Enum classes in Kotlin
• Kotlin extension function
• Kotlin generics

Exception Handling

• Kotlin Exception Handling | try, catch, throw and finally
• Kotlin Nested try block and multiple catch block

Null Safety

• Kotlin Null Safety
• Kotlin | Type Checking and Smart Casting
• Explicit type casting

Regex & Ranges

• Kotlin Regular Expression
• Kotlin Ranges

Java Interoperability

• Java Interoperability - Calling Kotlin from Java
• Java Interoperability - Calling Java from Kotlin

Miscellaneous

• Kotlin annotations
• Kotlin Reflection
• Kotlin Operator Overloading
• Destructuring Declarations in Kotlin
• Equality evaluation in Kotlin
• Comparator in Kotlin
• Triple in Kotlin
• Pair in Kotlin
• Kotlin | apply vs with

Android

• Kotlin Android Tutorial
• How to create project in Android Studio using Kotlin
• How to install Android Virtual Device(AVD)
• Android Animations in Kotlin
• Android Fade In/Out in Kotlin
• Android Menus
• Android progress notifications in Kotlin
• Android Project folder Structure

Hello World program in Kotlin

In Kotlin, the traditional "Hello, World!" program is quite simple. Here's how you can write it:

fun main() {
    println("Hello, World!")
}

To run this:

• Make sure you have the Kotlin compiler installed. You can download it from the official Kotlin website or use SDKMAN, a popular tool to manage parallel versions of multiple Software Development Kits.

• Save the code above to a file named HelloWorld.kt.

• Compile the Kotlin code with:

kotlinc HelloWorld.kt -include-runtime -d HelloWorld.jar

• Run the compiled program with:

java -jar HelloWorld.jar

Upon running, you should see the output:

Hello, World!

Alternatively, if you are using an Integrated Development Environment (IDE) like IntelliJ IDEA with Kotlin support, you can simply create a new Kotlin project or file and then run the program directly from the IDE.