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What does the header/footer do?
I get that it adds code but I don't understand the uses
It's useful if your code is long (you can collapse parts of it), but most importantly, it allows you to measure the byte count of the actual code without the surrounding boilerplate.
Ahh. That makes sense
So if you have code that is not part of the answer but needed you can actually measure code length
Is the TIO Brainf*ck wrapping?
The tape is 65536 cells long and circular. The cells are 8 bits wide and also wrap around.
Oh wow. So better use a non-wrapping constant