Variables and types

Defining variables

• val a: Int = 1 <- define type and value
• val a = 1 <- shorter version, type is inferred from value
• var a: Int <- type only, value must be set later

There are two keywords to define a variable:

• val for read-only variables (re-assignment of value is prohibited)
• var for a mutable variable

Basic types

keyword	description
Byte	8-bit integer
Short	16-bit integer
Int	32-bit integer
Long	64-bit integer
Float	32-bit floating point number
Double	64-bit floating point number
Char	single character
Boolean	16-bit integer
String	character string (immutable)