pxt-calliope/docs/reference/types.md

types

A type refers to a class of data and the operations permitted on that class of data. The following built-in types are supported for the @boardname@:

• String: a sequence of characters
• Number: an integer number (32-bit signed)
• Boolean: true or false
• Image: a collection of @boardname@ LED states (on/off)

TypeScript allows you to create user-defined classes of data.