Kotlin
v2.1.20
Solutions
Docs
Community
Teach
Play
Home
Get started
Take Kotlin tour
Kotlin overview
What's new in Kotlin
Kotlin evolution and roadmap
Basics
Concepts
Multiplatform development
Data analysis
Platforms
Standard library
Collections
Overview
Constructing collections
Iterators
Ranges and progressions
Sequences
Operations overview
Transformations
Filter
Plus and minus operators
Group elements
Retrieve collection parts
Retrieve single elements
Ordering
Aggregate operations
Write operations
List-specific operations
Set-specific operations
Map-specific operations
Read standard input
Opt-in requirements
Scope functions
Time measurement
Official libraries
API reference
Language reference
Tools
Compiler and plugins
Learning materials
Early access preview (EAP)
Other resources
Uh Oh!
Something went wrong.
Don’t worry, it’s not you — it’s us.
Sorry about that!