The Language
Part of the Fundamentals section of Coddy's Kotlin journey. Lesson 1 of 93.
Kotlin is a modern, expressive programming language developed by JetBrains. It runs on the Java Virtual Machine (JVM) and is the preferred language for Android app development.
Challenge
BeginnerWelcome to your first Kotlin program! The code is already written for you.
What to do:
- Look at the code:
println("Hello Kotlin!") - Press the "Run Code" button to execute it
- You should see "Hello Kotlin!" appear in the output
Try it yourself
fun main() {
println("Hello Kotlin!")
}
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Fundamentals
4Operators Part 1
Arithmetic OperatorsModulo OperatorAugmented AssignmentComparison OperatorsRecap - Simple Math7Basic IO
Println FunctionString TemplatesReadLine InputType ConversionRecap - Years Until RetirementRecap - True or False10Functions
Declare A FunctionParameters And ArgumentsReturn ValuesNamed ArgumentsDefault ValuesSingle Expression FunctionsRecap - Sigma FunctionRecap - Validation Function2Variables
Val vs VarType InferenceNumbersStringBooleanNaming ConventionsRecap - Initialize Variables5Operators Part 2
Logical Operators Part 1Logical Operators Part 2Logical Operators Part 3Ternary With If ExpressionRecap - Simple Logic8Bill Split Calculator
Welcome MessageGetting Input
Calculating Tip And TotalSplitting The BillFormatted Output3Nullability
What Is Null SafetyNullable TypesSafe Call OperatorElvis OperatorFunction Challenge BasicsNot Null AssertionRecap - Safe Access6Decision Making
If StatementIf - ElseIf As An ExpressionWhen ExpressionWhen With RangesRecap - Simple Calculator9Loops
For LoopWhile LoopDo-While LoopBreakContinueRanges In LoopsNested LoopRecap - FactorialRecap - Dynamic InputPractice on your own: Kotlin playground