HP 39g hp 39g & 40g_user's manual_English_E_pdfbpia5212.pdf - Page 207

15 Programming Introduction This chapter describes how to program using the HP 39G/ 40G. In this chapter you'll learn about: • using the Program catalog to create and edit programs • programming commands • storing and retrieving variables in programs • programming variables. HINT More information on programming, including examples and special tools, can be found at HP's calculators web site: www.hp.com/calculators The Contents of a Program Structured Programming Example An HP 39G/40G program contains a sequence of numbers, mathematical expressions, and commands that execute automatically to perform a task. These items are separated by a colon ( : ). Commands that take multiple arguments have those arguments separated by a semicolon ( ; ). For example, PIXON xposition;yposition: Inside a program you can use branching structures to control the execution flow. You can take advantage of structured programming by creating building-block programs. Each building-block program stands alone-and it can be called from other programs. Note: If a program has a space in its name then you have to put quotes around it when you want to run it. RUN GETVALUE: RUN CALCULATE: RUN "SHOW ANSWER": This program is separated into three main tasks, each an individual program. Within each program, the task can be simple-or it can be divided further into other programs that perform smaller tasks. Programming 15-1