Variables

Variables can be declared two different ways. val or var. Depending on if the variable is val or var, the variable will behave differently.

The type of the variable in Kotlin can be either explicitly given or the type can be inferred. To explicitly define the type, place a : after the variable name and then the type.

var name: Type

Val vs Var

Val

Defining a variable with the val keyword makes the variable read-only.

Read-only variables are variables that can only be assigned a value once.

  val a: Int = 9 // explicit typing, immediate assignment of value
  val b = 2 // Type 'Int' is inferred
  val c: Int // Type is required when no initializer is provided
  c = 3

Var
- Defining a variable with the var keyword allows the variable to be reassigned.
```
  var x = 5 // Type 'Int' is inferred
  x += 1
```