Controlling program exit

[Han]

I recommend using a "flag" variable to exit. For example,

Code:


local exit_flag:=0;

REPEAT
   // your code here; set exit_flag to 1 if desired key is pressed
UNTIL exit_flag; // (set exit_flag to non-zero to exit)

I have not tested your code, but it looks like you have at least one potential issue related to the test condition input==19. If input is a list, then what does input==19 return?