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Welcome to KOTLIN

Congratulations on taking the first step toward becoming a real programmer.

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Learn. Practice. Build.

This course is designed to take you from the fundamentals to advanced programming concepts through structured learning, practical examples, and hands-on experience.

Whether you're completely new to programming or an experienced developer looking to expand your skills, you'll find everything you need to move forward with confidence.

Your Path to Becoming a Code Hero

01

Learn

Understand programming concepts step by step and build a strong technical foundation.

02

Practice

Reinforce your knowledge with examples, exercises, and practical coding challenges.

03

Build

Turn what you learn into practical programming skills that you can use in real projects.

user@zero-to-hero:~/course$ start --learning
// Your journey begins now...
✓ Course initialized
✓ Learning path ready
✓ Time to become a Code Hero

Ready to Level Up?

Start the course, keep practicing, and take your programming skills from zero to hero.

Course Syllabus

Explore the complete learning path and see exactly what you'll learn throughout this course.

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What You'll Learn

Follow the roadmap below and progress from the fundamentals to advanced concepts.

This comprehensive course teaches Kotlin from the ground up, covering everything from basic syntax and object-oriented programming to advanced features like coroutines and Jetpack Compose. Perfect for beginners and experienced developers alike, you'll build modern Android apps using the latest tools and best practices.

Course Outline:

1. Introduction to Kotlin

  1. What is Kotlin. First Program
  2. First Program in IntelliJ IDEA

2. Basics of Kotlin

  1. Program Structure
  2. Variables
  3. Data Types
  4. Console Input and Output
  5. Arithmetic Operations
  6. Conditional Expressions
  7. if...else Conditional Structure
  8. when Conditional Structure
  9. Loops
  10. Ranges
  11. Introduction to Arrays

3. Functional Programming

  1. Functions and Their Parameters
  2. Variable Number of Parameters (Vararg)
  3. Returning Results. return Operator
  4. Single-Line and Local Functions
  5. Function Overloading
  6. Function Types
  7. Higher-Order Functions
  8. Anonymous Functions
  9. Lambda Expressions
  10. Closures

4. Object-Oriented Programming

  1. Classes and Objects
  2. Constructors
  3. Packages and Import
  4. Inheritance
  5. Method and Property Overriding
  6. Visibility Modifiers
  7. Getters and Setters
  8. Abstract Classes and Methods
  9. Interfaces
  10. Nested and Inner Classes and Interfaces
  11. Data Classes
  12. Enums
  13. Delegation
  14. Anonymous Classes and Objects
  15. Companion Objects

5. Generics

  1. Generic Classes and Functions
  2. Generic Constraints
  3. Variance, Covariance, and Contravariance

6. Additional OOP Features

  1. Exception Handling
  2. Null and Nullable Types
  3. Type Conversions
  4. Extension Functions
  5. Operator Overloading
  6. Delegated Properties
  7. Scope Functions
  8. Infix Notation

7. Collections and Sequences

  1. Mutable and Immutable Collections
  2. List
  3. Set
  4. Map
  5. Sequences
  6. Arrays
  7. Difference Between Sequences and Iterable Collections
  8. Filtering
  9. Element Checking
  10. Transformations
  11. Grouping
  12. Sorting
  13. Aggregate Operations
  14. Adding, Subtracting, and Merging Collections
  15. Getting Subset of Elements
  16. Getting Specific Elements

8. Coroutines

  1. Introduction to Coroutines
  2. Coroutine Scope
  3. launch and Job
  4. Async, Await, and Deferred
  5. Coroutine Dispatcher
  6. Cancelling Coroutine Execution
  7. Channels

9. Asynchronous Streams

  1. Introduction to Asynchronous Streams
  2. Creating Asynchronous Streams
  3. Stream Operations
  4. Functions: count, take, and drop (Number of Elements in a Stream)
  5. Functions: first, last, single
  6. Data Transformation: map and transform
  7. Data Filtering
  8. Reducing Data: Functions reduce and fold
  9. Merging Streams

Why Enroll

Enroll in this course to gain hands-on experience in modern Android development using Kotlin and Jetpack Compose. You'll build real-world projects, strengthen your programming skills, and prepare for professional app development roles.

Learn. Practice. Build.

Work through each section, practice what you learn, and keep progressing toward becoming a Code Hero.

Interview Questions

1. What is the difference between `val` and `var` in Kotlin?

2. What are extension functions in Kotlin?

3. What is a data class in Kotlin and when would you use it?

4. What are coroutines in Kotlin?

5. What is the purpose of the `when` expression in Kotlin?

6. What is the difference between `val` and `var` in Kotlin?

7. What is a data class in Kotlin and why is it used?

8. What is the purpose of null safety in Kotlin?

9. What are higher-order functions in Kotlin?

10. What is a lambda expression in Kotlin?

11. What is the difference between `==` and `===` in Kotlin?

12. What are extension functions in Kotlin?

13. What are companion objects in Kotlin?

14. What is the purpose of sealed classes in Kotlin?

15. What is the use of `let`, `apply`, `also`, `run`, and `with` in Kotlin?





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