Meating of option 'ID'

Hi everyone!
That's odd option, which isn't needed:

I know this option but really is needed?

It actually is needed. It has to do with linked lists. ID OF reports a copy of whatever is inside it, so the lists don't link

It reports a copy of whatever you put in, which may seem unneeded for numbers but is very important with lists.

Okay, thanks @_notwait and @helicoptur for explanation :grinning: