Language lab · Intermediate → Android

🟣 Kotlin

Concept → trace → write code → run tests → explain why → improve → mini-project. Start in the browser if you like; set up your own computer when you are ready.

💻 Runs on your computerOfficial download & docs ↗

🛠️ Set up and verify

Install

install Android Studio or IntelliJ IDEA (Kotlin is built in)

brew install kotlin

sdk install kotlin   (using SDKMAN!)

Editor: Visual Studio Code with Kotlin (IntelliJ IDEA / Android Studio).

Create hello.kt

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

Run it and check the version

kotlinc hello.kt -include-runtime -d hello.jar && java -jar hello.jar
kotlinc -version

Health check: paste what your terminal printed.

Install one language at a time. These commands only install or print versions; nothing here deletes files. Versions change: check the official page and note the version you installed.

🧭 The 14-lab path

00 · Setup and verify — install the runtime and editor, run hello world, print the version, fix PATH
01 · Syntax and trace — follow each line and the value of every variable
02 · Logic — conditionals and decision trees
03 · Loops — trace tables and loop challenges
04 · Functions — break problems down and test each piece
05 · Data structures — lists, maps, stacks, queues and trees you can see
06 · Debugging — bug cases with a hint ladder
07 · Algorithms — search, sort and Big-O comparison
08 · Files and data — read and write fixture files
09 · API or database — talk to a mock API or a sandbox database
10 · Testing — write tests and read failing assertions
11 · Security — secure coding and dependency hygiene for this language
12 · Project — one portfolio mini-project
13 · Assessment — quiz, coding test, rubric and an explain-your-answer prompt

📚 Modules

syntax
null safety
functions
classes
collections
coroutines
unit tests
Android UI and lifecycle (optional)

🏗️ Mini-projects

Offline quiz app
Study checklist
Mock API client

Projects use synthetic data only.