A field is variable, define, or constant inside of a class body.

class Point {
    var x:Int
    var y:Int

In this example, the class Point has two fields, x and y. Each instance of Point has its own independent copies of these fields. As Frost does not feature global variables, the only class-level fields (called 'static' fields in many languages) in Frost are constants.

Fields which do not have default values must be initialized prior to invoking the superclass init method.