Kotlin Kotlin for Java Developers Declaring Variables
Example
In Kotlin, variable declarations look a bit different than Java's:
val i : Int = 42
-
They start with either
valorvar, making the declarationfinal("value") or variable. -
The type is noted after the name, separated by a
: -
Thanks to Kotlin's type inference the explicit type declaration can be obmitted if there is an assignment with a type the compiler is able to unambigously detect
| Java | Kotlin |
|---|---|
int i = 42; | var i = 42 (or var i : Int = 42) |
final int i = 42; | val i = 42 |
