From the course: CompTIA IT Fundamentals (FC0-U61) Cert Prep 1: Computer Basics, Hardware, and Operating Systems
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Basics of binary
From the course: CompTIA IT Fundamentals (FC0-U61) Cert Prep 1: Computer Basics, Hardware, and Operating Systems
Basics of binary
- How many fingers am I holding up? 10, right? This is how humans count. It's called base 10. We count things from zero to nine, and then it goes to 10 and beyond. Computing devices don't work that way. Computing devices use wires and electricity. They use a math called binary, or base 2. It's all about the state of electricity on a wire. If a wire has electricity on it, it's on, right? We call that a 1. If it doesn't have electricity, it's off. We call that a 0. Let's take a look at the way we can use binary and talk about binary math so that it's totally relevant for computing fundamentals. I have here a circuit board connected to a battery pack and two little LED circuits. Now, when I make a connection to one of these circuits, like this guy here on the left, the LED turns on, and when I take it away, it turns off. So you can say that the state of the connection, right, is either on or off. In binary, we use…
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