Propeller Manual

VAR – Spin Language Reference
VAR
Designator: Declare a Variable Block.
VAR
Size Symbol 〈[Count ]〉 〈  Size Symbol 〈 [Count ]〉〉...
VAR
Size Symbol 〈[Count ]〉 〈 , Symbol 〈 [Count ]〉〉...
• Size is the desired size of the variable, BYTE, WORD or LONG.
•
Symbol is the desired name for the variable.
•
Count is an optional expression, enclosed in brackets, that indicates this is an array
variable, with Count number of elements; each being of size byte, word or long.
When later referencing these elements, they begin with element 0 and end with
element Count-1.
Explanation
VAR is the Variable Block declaration. The Variable Block is a section of source code that
declares global variable symbols. This is one of six special declarations (
CON, VAR, OBJ, PUB,
PRI, and DAT) that provide inherent structure to the Spin language.
Variable Declarations (Syntax 1)
The most common form of variable declarations begins with
VAR on a line by itself followed
by one or more declarations.
VAR must start in column 1 (the leftmost column) of the line it is
on and the lines following it must be indented by at least one space.
VAR
byte Str[10]
word Code
long LargeNumber
This example defines Str as a byte array of 10 elements, Code as a word (two bytes) and
LargeNumber as a long (four bytes). Public and Private methods in the same object can refer
to these variables in ways similar to the following:
Page 210 · Propeller Manual v1.1