User manual HP F2221AA

[. . . ] Reproduction, adaptation, or translation of this manual is prohibited without prior written permission of Hewlett-Packard Company, except as allowed under the copyright laws. It identifies examples or keystrokes that are shown in RPN mode and must be performed differently in ALG mode. That is, press and release the shift key, then press (which has OFF printed in yellow above it). since the calculator Has Continuous Memory, turning it off does not affect any information you've stored. [. . . ] The statistics register assignments in the HP 35s are shown in the following table. Summation registers should be referred to by names and not by numbers in expression, equations and programs. You can load a statistics register with a summation by storing the number (-27 through -32) of the register you want in I or J and then storing the summation (value 7 or A). Similarly, you can press 7 or A (or 7 or A ) to view (or recall)a register value -- the display is labeled with the register name. See "Indirectly Addressing Variables and Labels" in chapter 14 for more information. Part 1 of this manual introduced you to functions and operations that you can use manually, that is, by pressing a key for each individual operation. And you saw how you can use equations to repeat calculations without doing all of the keystrokes each time. In part 2, you'll learn how you can use programs for repetitive calculations -- calculations that may involve more input or output control or more intricate logic. A program lets you repeat operations and calculations in the precise manner you want. In the next chapter, "Programming Techniques, " you will learn about subroutines and conditional instructions. To find the area of a circle with a radius of 5, you would use the To get the result for this circle, 78. Rather than repeat the given keystrokes each time (varying only the "5" for the different radii), you can put the repeatable keystrokes into a program: This very simple program assumes that the value for the radius is in the X­ register (the display) when the program starts to run. In RPN mode, to enter this program into program memory, do the following: Try running this program to find the area of a circle with a radius of 5: This sets the program to its beginning. In ALG mode, to enter this program into program memory, do the following: Try running this program to find the area of a circle with a radius of 5: This sets the program to its beginning. We will continue using the above program for the area of a circle to illustrate programming concepts and methods. What you put in a program affects how it appears when you view it and how it works when you run it. selecting a Mode Programs created and saved in RPN mode should be edited and executed in RPN mode, and programs or steps created and saved in ALG mode should be edited and executed in ALG mode. If you want more than one program stored in program memory, then a program needs a label to mark its beginning (such as ) and a return to mark its end (such as ). Program Labels Programs and segments of programs (called routines) should start with a label. The letter keys are used as they are for variables (as discussed in chapter 3). You cannot assign the same label more than once (this causes the message ), but a label can use the same letter that a variable uses. It is possible to have one program (the top one) in memory without any label. [. . . ] Shows the full mantissa (all 12 digits) of x (or the number in the current program line); displays hex checksum and decimal byte length for equations and programs. Solves the displayed equation or the program selected by FN=, using initial estimates in variable and x. Begins program execution at the current program line; stops a running program and displays the X­register. Displays the labeled contents of variable without recalling the value to the stack. [. . . ]