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498 Programming
Some built-in commands employ an alternative syntax
whereby function arguments do not appear in
parentheses. Examples include RETURN and RANDOM.
Program
Structure
Programs can contain any number of subroutines (each of
which is a function or procedure). Subroutines start with a
heading consisting of the name, followed by parentheses
that contain a list of parameters or arguments, separated
by commas. The body of a subroutine is a sequence of
statements enclosed within a BEGIN–END; pair. For
example, the body of a simple program, called
MYPROGRAM, could look like this:
EXPORT MYPROGAM()
BEGIN
PIXON(1,1);
END;
Comments When a line of a program begins with two forward
slashes, //, the rest of the line will be ignored. This
enables you to insert comments in the program:
EXPORT MYPROGAM()
BEGIN
PIXON(1,1);
//This line is just a comment.
END;
The Program Catalog
The Program Catalog is where you run and debug
programs, and send programs to another HP Prime. You
can also rename and remove programs, and it is where
you start the Program Editor. The Program Editor is where
you create and edit programs. Programs can also be run
from Home view or from other programs.