HP 30b HP 20b Business Consultant and HP 30b Business Professional User's Guid - Page 86

Keys :E Display 5== Description Quits program editing mode. Note that program 0 uses 13 bytes and has a checksum of 104. Checksum is a number that verifies the program data is correct. You must be set in FIX 3 or higher to see the full checksum. If your number does not match that shown, verify your FIX setting is set for 3 or higher. If three digits are showing and the number differs from that shown, the program has been keyed in incorrectly. Enters the number 5 (the sphere radius) and executes program 0. The result, the volume of the sphere, is 523.6. We press = twice: the first press completes the entry of the 5 (after all, we could have been in the process of entering an equation, such as 5*2). The second press runs the program. Program Step 0 I Programs start at step 1, however, if you edit a program by pressing with the > program displayed and press the up key , you will find there is a step 0. Press any key with step 0 displayed and that key becomes a shortcut for the program. You may also assign : any (HOLD) key combination as well. For example, with the sphere example shown in Table 13-2, after your program has calculated :E the solution, press to open the program menu once again. Prgm 0 is displayed, Figure 1 I > the program used for the sphere example (Figure 1). Press , followed by to : k select step 0. Press followed by (assuming you are not interested in using the k O key). Exit the program by pressing , key in a number, 5, and then press :k and you will see the your program was executed with the same results as shown in the table! 78 Programming