Processing software not working

Processing Electronics (Arduino, etc.)
5

Oh this is interesting to know. I looked up in the code, and I have this line in the setup()

void setup() {
  size(660, 700); 
  //size(800,700);
  //size(2048,1152);
  frameRate(10);
...

Could you tell me where should I put the exit() as I didn’t find the exit() function? Also, I looked up here but don’t know if I have to put the exit in the mousePressed(). Please let me know. Thanks
https://processing.org/reference/exit_.html