Up until recently, have been trying to validate user input by writing lengthy if-statetments nested in while-loops. I usually have the while-loop check that the function that takes input - for instance getchar() - is not EOF and the if-statement checking whether input is of the desired data type and/or size. But then I noticed people doing something similar with infinite loops while(1) and for(;;).

While I understand that these loops are infinite because there is no condition to check against in for(;;) and because the condition is always true in while(1), I wonder if there is a more pedagogical (?) way of expressing the same thing. Like a proof of concept, or like what's going on at the electronic/logic level, if one were to draw this on a schematic with logic gates.

Or am I perhaps overthinking it and there is "simply" a signal/transistor somewhere that is always on/1/true/has the approproate votlage? Feels like "fooling" the machine by writing while(1) or for (;;) ....