About Labels
Labels are used as markers throughout the program. Labels are used to mark a position in the program to ‘jump to’ from another position using a goto, gosub or other command.
Labels can be any word (that is not already a reserved keyword) and may contain digits and the underscore character. Labels must start with a letter or underscore (not digit), and are followed directly by a colon (:) at the marker position. The colon is not required within the actual commands.
The compiler is not case sensitive. Lower and/or upper case may be used at any time.
Example:
'This program will flash the light until the button is pressed
'off. Notice the label named SWITCH_OFF.
#chip 16F628A, 4
#define BUTTON PORTB.0
#define LIGHT PORTB.1
Dir BUTTON In
Dir LIGHT Out
Do
PulseOut LIGHT, 500 ms
If BUTTON = 1 Then Goto SWITCH_OFF
Wait 500 ms
If BUTTON = 1 Then Goto SWITCH_OFF
Loop
SWITCH_OFF:
Set LIGHT Off
'Chip will enter low power mode when program ends
