HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 96

96 Section 8: Programming Basics z With the calculator in Run mode, pressing gi followed by two digit keys sets the calculator to the program line specified by the digit keys. Since the calculator is not in Program mode, the line number and keycode are not displayed. The decimal point is not necessary if the calculator is in Run mode, but it is necessary if the calculator is in Program mode. For example, assuming the calculator is still in Program mode, you can set it to program line 00 as follows: Keystrokes gi.00 Display 00- Program line 00 Executing a Program One Line at a Time Pressing Ç repeatedly with the calculator in Program mode (as described earlier) enables you to verify that the program you have stored is identical to the program you wrote - that is, to verify that you have keyed the instructions in correctly. However, this does not ensure that the program you wrote calculates the desired results correctly: even programs created by the most experienced programmers often do not work correctly when they are first written. To help you verify that your program works correctly, you can execute the program one line at a time, using the Ç key. Pressing Ç while the calculator is in Run mode advances the calculator to the next line in program memory, then displays that line's number and the keycode of the instruction stored there, just as in Program mode. In Run mode, however, when the Ç key is released the instruction in the program line just displayed is executed and the display then shows the result of executing that line. For example, to execute the program stored in the calculator one line at a time: Keystrokes fs 625 Ç Ç Display 124.25 625. 01625.00 02- Sets calculator to Run mode and to line 00 in program memory. (Display shown assumes results remain from previous calculation.) Keys in price of typewriter. 36 Program line 01: \ Result of executing program line 01. 2 Program line 02: 2. File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 96 of 209 Dimension: 14.8 cm x 21 cm