Rice Lake iRite IDE - Manual (Page 25)

920i Programming Reference - Language Syntax 21 To be the best by every measure
begin
return A + B;
end;
function PoundsPerGallon : Real;
begin
return 8.34;
end;
3.4 Statements
There are only six discrete statements in iRite . Some statements, like the if, call, and assignment (:=) are used
extensively even in the simplest program, while the exit statement should be used rarely. The if and the loop
statements have variations and can be quite complex. Let’s take a closer look at each of the six:
<stmt>:
<assign-stmt>
| <call-stmt>
| <if-stmt>
| <return-stmt>
| <loop-stmt>
| exit-stmt>
;
3.4.1 Assignment Statement
expr
:=
Figure 3-11. Assignment Statement Syntax
The assignment statement uses the assignment operator (:=) to assign the expression on the right-hand side to the
object or component on the left-hand side. The types of the left-hand and right-hand sides must be compatible.
The value on the left of the “:=” must be a modifiable value. Here are some examples:
Simple assignments:
iMaxPieces := 12000;
rRotations := 25.3456;
sPlaceChickenPrompt := "Please place the chicken on the scale…";
Assignments in declarations (initialization):
iRevision : integer := 1;
rPricePerPound : real := 4.99;
csProgramName : constant string := "Pig and Chicken Weigher";
Assignments in for loop initialization:
for iCounter := 1 to 25
for iTries := ciFirstTry to ciMaxTries
Assignment of function return value:
sysReturn := GetSPTime(4, dtDateTime);
rCosine := Cos(1.234);
Assignment with complex expression on right-hand side:
iTotalLivestock := iNumChickens + iNumPigs + GetNumCows;