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Kotlin Cheat Sheet (DRAFT) by

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

Comments

Multiple Line Comment
 
/* Multiple 
 Line 
 Comment 
 */
Single Line Comment
 
// Single Line Comment
Unlike Java, Kotlin comments can be nested (A comment inside another)
  

Variables

Mutable
 
var a: Int = 5
Immutable
 
val a: Int = 5
, read only
must be initia­lized (const­ruc­tor...)
Inferred
 
var a = 5

val a = 5
Optionals
 
var a: Int?

Must be initia­lized in constr­uctor
Getter And Setter
 
var a: Int