Arduino HIGH LOW

Question

I have an Arduino and I am wondering exactly what HIGH and LOW mean as far as actual values go... Are they signed ints? Unsigned ints? Unsigned chars??? What are their values? I

Answer 1

To add my two cents to codeling's answer:

Lines 18--25 of Arduino.h (1.0) are:

#define HIGH 0x1
#define LOW  0x0

#define INPUT 0x0
#define OUTPUT 0x1

#define true 0x1
#define false 0x0

Therefore, HIGH <==> OUTPUT <==> true <==> 0x1 and LOW <==> INPUT <==> false <==> 0x0. Then, HIGH <==> !LOW and LOW <==> !HIGH...