Learn Kotlin: Course OverviewCourse Overview

Introduction to Kotlin

Get started with Kotlin by learning everything you need to know to create your first basic program!

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Key Concepts

Review core concepts you need to learn to master this subject

The main() Function

Print Statements

Comments

Order of Execution

The main() Function

fun main() {
  // Code goes here
}

The main() function is the starting off point of every Kotlin program and must be included in the code before execution.

Print Statements

fun main() {
  // Code goes here
}

A print statement outputs values to the output terminal.

Using a println() statement will create a new line in the output terminal after printing values, while a print() statement will not.

Comments

fun main() {
  // Code goes here
}

Comments are used to document what is happening inside of a program and are ignored by the compiler.

A single-line comment is used to write a comment on one line, while a multiline comment is used to write longer comments that span over multiple lines.

Order of Execution

fun main() {
  // Code goes here
}

Code is read, compiled, and executed in top-down order.

Introduction to Kotlin

Lesson 1 of 1

1
Welcome to the world of coding with Kotlin! Kotlin is a programming language that, after its release in 2016 by JetBrains, quickly gained popularity amongst develope…
2
What better way to start learning about Kotlin than to run a Kotlin program? Before we run our first program, let’s take a moment to understand our current environment. Code is written and edited …
3
Think of writing code like going on an adventure: we always need to start somewhere. In Kotlin, the journey begins in the main() function. The main() function is the “jumping off” point for our …
4
In the last exercise, we were able to display the text Coding is fun! in the output terminal with the following code: fun main() { println(“Coding is fun!”) } We accomplished this feat using a p…
5
Similar to instructions in a recipe, code is read, compiled, and executed in a top-down order. When we run a program, a compiler translates our Kotlin co…
6
Documenting what our code is accomplishing is a good programming practice because it makes our code understandable for both the programmer and anyone else who reads it. Comments allow us to wri…
7
While every programmer is different, there is one experience we all share: getting an error message. An error, or bug, causes our programs to behave in unexpected ways. When we receive an error me…
8
In programming, formatting conventions are the suggested rules for how code should be structured in a specific programming language. By following Kotlin’s formatting standards, or coding convention…
9
Great job completing the first lesson on learning Kotlin! Let’s go over all the content we have discussed: Kotlin is a general-purpose programming language. The main() function is the starting …