Kotlin Basics

Basics

• Hello World
• Variable Declaration
• Explicit Type Declaration
• Errors in Variable Assignment
• Assigning a variable to another variable
• String Template

Basic Types

• Integers
• Floating Points
• Boolean
• Character
• String

Arrays

• Basics
• Loop through an array
• Check if an Element exists in an array

Functions

• Basic - Parameterless Function
• Parameterized Function
• Return from a function
• No Return Value from a function
• Single Expression Bodies
• Default Parameters
• Function Overloading

Conditional Statements

• Simple if
• if...else
• if...else if...else
• when
• Conditional Statements as Expressions

Loops

• while
• for
• do while

Read Console Input

• Using Java Scanner
• Without using Java Scanner

Simple Console Applications

• Rock Paper Scissors Game

Interoperability with Java

• Using Java libraries in Kotlin
  • Scanner
  • ArrayList
  • Calendar
• Using Java in Kotlin
  • Static Java Methods
  • Non-static Java methods
• Using Kotlin in Java
  • Kotlin Functions
  • Kotlin Class

Classes and Objects

• Basics
• init block
• lateinit
• Getters and Setters - 1
• Getters and Setters - 2
• Secondary Constructor
• Extension Functions

Inheritance

• Notes
• Code

Abstract Class

• Notes
• Code

Interface

• Notes
• Basic Interface
• Multiple Inheritance
  • Implementing two Interfaces
  • Implementing a Interface and extending a Class

Scope Functions

• Example of when should we use run, let, apply, also and with on Kotlin

Infix Functions

• Infix Functions in Kotlin - baeldung
• Infix in Kotlin
• Infix Functions in Kotlin - Bringing our code closer to natural language

Object Keyword

• Singleton Class
• Inner Class
• Anonymous Inner Class

'is' and 'as' Operator

• Type Checking (is operator)
• Smart Casting
• Type Casting (as operator)

Exception Handling

• try..catch blocks

Sealed Class

• Unlocking the Power of Sealed Classes in Kotlin: Design Patterns and Better Code Organization

Annotation

• Guide to JVM Platform Annotations in Kotlin
• @JvmOverloads