In a previous lesson, you saw how to read a digital input, which was always a 0 or a 1. It might have
seemed kind of silly to have such limit data. But it is not. Here's an example of digital information: a switch. A switch
can be either pressed or unpressed. These are the two possible states of a switch. You can think of pressed as a 1 and unpressed
as a 0--see TWO states. A switch is kind of a digital device.
Wire up the circuit shown below, then run the following code. Press the button a few times. What do you see as the output?
Now you try. Seeing how a push-button switch returns digital information.