# Introduction to Binary

## Starter

### Starter – Morse Code

Morse code stater activity

## What is binary?

### What is binary?

Binary is any system that consists of only two forms.

For example:

• 1 or 0
• True or False
• On or Off
• Voltage or No Voltage
• Light or Dark
• Black or White

## Why use binary?

### Why do computers use binary?

#### Summary

• Binary data can be transmitted easily and reliably.
• Binary data can be stored and read very easily and reliably.
• Computers use circuits that can only be on one of 2 states – on or off, these work very well with binary calculations.
• The input voltage in to computers is not very stable, so only a system that use voltage/no voltage would be reliable.

### What do the binary numbers represent?

Depending on what data is being stored, binary above could represent:

• Text / Numbers
• Images
• Sound
• Instructions

## Bits, Bytes,Nibbles

Bit   – e.g. 0

Each individual 1 or 0 is known as a bit.

Here are three bits – 110

Byte – e.g. 11001100

Each group of 8 bits is known as a Byte

Here is a stream of Bytes:

01010011 01101011 01111001 01110010 01101001 01101101 00100000 01101001 01110011 00100000 01100001 01110111 01100101 01110011 01101111 01101101 01100101 00100001

Nibble – e.g. 1111

A nibble is 4 bits, or half a Byte.

Here is a nibble – 1101