Lectures

Introductory lecture for beginners: motivation, Kotlin’s capabilities, and examples of where it’s used — from Android to backend and cloud services.

In this lecture, you’ll figure out what commands are in programming, how Kotlin executes code from top to bottom, why the main() function is needed, and how to write and run your first program that prints text using println(). Everything is explained in simple words, with examples and step-by-step instructions.

In this lecture, you will get to know the console output commands in Kotlin: println() and print(). You will learn the difference between them, learn how to output numbers and strings, concatenate strings using +, and also look at typical beginner mistakes when printing text.

In this lecture, you will figure out what variables are in Kotlin, how var and val differ, how to declare variables with a type, assign values using =, and also get to know naming rules and examples of valid and invalid names.

In this lecture, you’ll figure out how to declare variables in Kotlin using var and val, how type inference works, and you’ll also get to know the most popular types: Int, String, Double, Boolean, and Char. At the end, there’s a literal table and examples of printing values with println().

In this lecture, you will learn why Kotlin programs need a compiler, how Kotlin code turns into JVM bytecode (and what happens next during execution), what typical compilation errors beginners encounter, and how to properly use single-line and multi-line comments.

A final summary of the first Kotlin level: why the language became popular, where it is used in the industry, and what core topics you have already mastered.