Digital electronics can handle digital signals in discrete bands of analog levels, rather than continuous ranges like analog electronics. Each level within a range of values represents the same information state.
Most cases have two states. They are represented by two voltage bands. One is near a reference value, commonly called “ground” or zero voltages, and the other near the supply voltage. These are the true and false values.
Digital techniques are more useful than traditional methods because it is much easier to make an electronic device switch to one of many known states rather than reproduce a continuous range.
Digital electronics circuits are often made up of large assemblies of logic gates. They can also be simple electronic representations for boolean logic functions.