Rice Lake iRite IDE - Manual (Page 15)

920i Programming Reference - Language Syntax 11 To be the best by every measure
Real Constants: A real constant is an integer constant immediately followed by a decimal point and another
integer constant. Real constants conform to the requirements of IEEE-754 for double-precision floating point
values. When the compiler “sees” a number in the format n.n then a real constant is created. The value .56 will
generate a compiler error. Instead compose real constants between –1 and +1 with a leading zero like this: 0.56
and –0.667. The following gives examples of situations where a real constant is used:
rLength := 9.25;
if rValue <= 0.004 then
sResultString := RealToString(98.765);
rLogResult := Log(345.67);
String Constants: A string constant is a sequence of printable characters delimited by quotation marks (double
quotes, " "). The maximum length allowed for a string constant is 1000 characters, including the delimiters.
The following gives examples of situations where a string constant (or string literal) is used:
sUserPrompt := "Please enter the maximum barrel weight:";
WriteLn(iPrinter, "Production Report (1st Shift));
if sUserEntry = "QUIT" then
DisplayStatus("Thank You!");
3.1.4 Delimiters
Delimiters include all tokens other than identifiers and keywords, including the arithmetic operators listed below:
>= <= <> := <> = + – * /
. , ; : ( ) [ ] "
Delimiters include all tokens other than identifiers and keywords. Below is a functional grouping of all of the
delimiters in
iRite .
Punctuation
Parentheses
() (open and close parentheses) group expressions, isolate conditional expressions, and indicate function
parameters:
iFarenheit := ((9.0/5.0) * iCelcius) + 32; -- enforce proper precedence
if (iVal >= 12) and (iVal <= 34) or (iMaxVal > 200) -- conditional expr.
EnableSP(5); -- function parameters
Brackets
[ ] (open and close brackets) indicate single and multidimensional array subscripts:
type CheckerBoard is array [8, 8] of recSquare;
iThirdElement := aiValueArray[3];
Comma
The comma(,) separates the elements of a function argument list and elements of a multidimensional array:
type Matrix is array [4,8] of integer;
GetFilteredCount(iScale, iCounts);
Semicolon
The semicolon (;) is a statement terminator. Any legal iRite expression followed by a semicolon is interpreted as
a statement. Look around at other examples, it’s used all over the place.
Colon
The colon (:) is used to separate an identifier from its data type. The colon is also used in front of the equal sign
(=) to make the assignment operator:
function GetAverageWeight(iScale : integer) : real;
iIndex : integer;
csCopyright : constant string := "2002 Rice Lake Weighing Systems";