README.adoc

Spin Quick Reference

Terms

• Expression - Any combination of symbols that can represent a value.

Constants

Constants are named values that cannot change. They work like integers, but if a value is used often enough, using constants makes your code easier to read and modify.

Constants are declared in CON blocks.

CON
    DOZEN = 12

Variables

Variables are named values that can change. All variables in Spin consist of integers of different sizes.

name	type	unsigned range	signed range
byte	8-bit integer	0 - 255	-128 - 127
word	16-bit integer	0 - 65,535	-32,768 - 32,767
long	32-bit integer	0 - 4,294,967,295	-2,147,483,648 - 2,147,483,647

Variables are created in a VAR block. They are initialized to zero by the compiler.

VAR
    byte    foo
    word    bar
    long    baz

Flow Control

Indentation

If Statements

Loops

All loops in Spin use the REPEAT command.

Data