## Thursday, January 17, 2013

### Boolean True False

We just learned about the colors in ROY G BIV.

You probably already know this, but True is a way of saying Yes.
and False is the opposite and means No.

A fancy word for True and False is Boolean
named after the famous mathemetician George Boole.

In computers and electronics, it's kind of like you're looking at a light bulb.
If the light bulb is ON, you can call that True or Yes or even the number 1.
Is the light bulb is OFF, you can call it False or No or the number 0.

(from: wikipedia - light bulb)

Inside computers the electricity that runs the computer has thousands
or even millions of little ones and zeroes, meaning True and False.

These little light bulbs are what make the pictures on your computer screen
and the light switches come from things like your keyboard and mouse.

You can imagine a room just filled with light bulbs and light switches,
and that's exactly what some of the oldest computers (like the ENIAC) looked like!

(from: wikipedia - eniac)