The Arduino Web Editor doesn't have the very useful Auto Format feature, which would make it much easier for you to find this sort of bug. I recommend you to use the real Arduino IDE if possible. You can download it for free from here:
The Arduino Web Editor doesn't have the very useful Auto Format feature, which would make it much easier for you to find this sort of bug. I recommend you to use the real Arduino IDE if possible. You can download it for free from here: