IFERR...THEN...ELSE…END allows a program to intercept error conditions that otherwise would cause the program to abort. Its syntax is:
IFERR
THEN clause_1
ELSE clause_2
END :
| Example |
|
| IFERR | Y: |
| 60/X | |
| THEN |
|
| MSGBOX "Error: X is zero.": | |
| ELSE |
|
| MSGBOX "Value is "Y: | |
| END: |
|
RUN | Runs the named program. If your program name contains | |
| special characters, such as a space, then you must | |
| enclose the file name in double quotes (" "). | |
| RUN "program name": or RUN programname: | |
STOP | Stops the current program. | |
| STOP: |
|
The drawing commands act on the display. The scale of the display depends on the current aplet's Xmin, Xmax, Ymin, and Ymax values. The following examples assume the hp 39gs default settings with the Function aplet as the current aplet.
ARC | Draws a circular arc, of given radius, whose centre is at |
| (x,y) The arc is drawn from start_angle_measurement, to |
| end_angle_measurement. |
| ARC x;y;radius;start_angle_measurement ; |
| end_angle_measurement: |
Programming |