HP HP-67 - Page 145

Simple Programming 141
A flowchart is an outline of the way a program solves a problem. With
224 possible instructions, it is quite easy to get ‘‘lost’” while creating a
long program, especially if you try to simply load the complete
program from beginning to end with no breaks. A flowchart is a
shorthand that can help you design your program by breaking it down
into smaller groups of instructions. It is also very useful as
documentation—a road map that summarizes the operation of a pro-
gram.
A flowchart can be as simple or as detailed as you like. Here is a
flowchart that shows the operations you executed to calculate the area
of a circle according to the formula A = 7rr2. Compare the flowchart
to the actual instructions for the program:
Key
in radius.
Start
Square radius.