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Kotlin Cheat Sheet (DRAFT) by

Übersicht der JVM Sprache Kotlin

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Basic

Functions
 
fun name(params) : rettype {}
expr. body
 
fun name(params) = expr
no return
 
fun start() {}
Variables
 
val name: type
inferred
 
val name = value
no init val
 
val name: type
mutable
 
var name: type
Comments
 
// end-of­-line comment
  
/* block comment */
String
 
"­name: ${p.na­me}­"
Nullable Type
 
Type?