Lecture 01 · Fundamentals

Introduction to Kotlin & Setup

Beginner ~50 min

What is Kotlin?

Kotlin is a modern, concise, and safe programming language developed by JetBrains. It is fully interoperable with Java and is the preferred language for Android development.

Why Kotlin?

Null safety built into the type system
Concise and expressive syntax
Excellent multiplatform support (Kotlin Multiplatform)
Seamless Java interoperability
Official language for Android

Installation & Setup

Download IntelliJ IDEA (Community Edition) or use Android Studio.

Hello.kt

fun main() {
    println("Hello, Kotlin Mastery!")
    println("Modern, safe, and fun!")
}

Output

Hello, Kotlin Mastery!
Modern, safe, and fun!

🎯 Exercise 1.1

Create a new Kotlin project in IntelliJ IDEA or Android Studio and run a program that prints your name and favorite feature of Kotlin.

Lecture 02 · Fundamentals

Variables & Data Types

Beginner ~45 min

val vs var

Use val for read-only variables and var for mutable variables.

val pi = 3.14
var score = 0
score = 10 // OK

Lecture 03 · Fundamentals

Control Flow & Expressions

Beginner ~50 min

When Expression

Kotlin's powerful replacement for the switch statement.

val result = when (x) {
    1 -> "One"
    2 -> "Two"
    else -> "Other"
}

Lecture 04 · Fundamentals

Functions

Beginner ~45 min

fun sum(a: Int, b: Int): Int = a + b

Lecture 05 · Fundamentals

Collections

Beginner ~40 min

val list = listOf("Apple", "Banana")
val mutableList = mutableListOf(1, 2)

Lecture 06 · Core Concepts

Classes & Objects

Intermediate ~60 min

Data Classes

Concise classes used to hold data.

data class User(val name: String, val age: Int)

Lecture 07 · Core Concepts

Null Safety & Extensions

Intermediate ~65 min

Safe Calls

val length = name?.length ?: 0

Lecture 08 · Core Concepts

Generics & Inline Functions

Intermediate ~50 min

Lecture 09 · Advanced

Coroutines & Async

Advanced ~70 min

Structured Concurrency

suspend fun fetchData() {
    delay(1000)
    println("Data fetched")
}

Lecture 10 · Advanced

Android Development Basics

Advanced ~60 min

Building modern Android UIs with Jetpack Compose.

Lecture 11 · Advanced

Multiplatform & Ktor

Advanced ~55 min

Share code across iOS and Android using Kotlin Multiplatform (KMP).

Lecture 12 · Capstone

Capstone Project: Android App

Advanced ~180 min

Build a fully functional Android Task Tracker using Kotlin, Jetpack Compose, and Room Database.

// Project requirements:
// 1. Use Coroutines for background tasks
// 2. Implement a local Room database
// 3. Design the UI with Jetpack Compose
// 4. Use ViewModel for state management