At the smallest scale in the computer, information is stored together bits and bytes. In this section, we"ll learn just how bits and bytes encode information.

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## Bit

a "bit" is atomic: the smallest unit of storageA bit stores just a 0 or 1"In the computer system it"s all 0"s and 1"s" ... BitsAnything with two separate states can store 1 bitIn a chip: electrical charge = 0/1In a tough drive: clues of North/South magnetism = 0/1A little is too tiny to be much useGroup 8 bits together to make 1 byteEverything in a computer system is 0"s and 1"s. The bit stores just a 0 or 1: it"s the smallest building block of storage.

## Byte

One byte = arsenal of 8 bitse.g. 0 1 0 1 1 0 1 0One byte can store one character, e.g. "A" or "x" or "\$"

## How countless Patterns through N Bits? (demo)

How countless different patterns have the right to be made through 1, 2, or 3 bits?Number of bits various Patterns
1 0 1
2 00 01 10 11
3 000 001 010 011 100 101 110 111
3 bits vs. 2 bitsConsider simply the leftmost bitIt deserve to only be 0 or 1Leftmost bit is 0, then append 2-bit patternsLeftmost little is 1, climate append 2-bit fads again3-bits has twice as countless patterns as 2-bitsNumber the bits different Patterns
1 0 1
2 00 01 10 11
3 000 001 010 011 100 101 110 111
In general: add 1 bit, double the variety of patterns1 little - 2 patterns2 bits - 4 3 bits - 84 bits - 165 bits - 326 bits - 647 bits - 1288 bits - 256 - one byteMathematically: n bits yields 2n trends (2 to the nth power)

## One Byte - 256 patterns (demo)

1 byte is team of 8 bits8 bits can make 256 different patternsHow to usage the 256 patterns?How to keep a number in a byte?Start v 0, go up, one pattern every number, till run the end of patterns0, 1, 2, 3, 4, 5, ... 254, 255One byte have the right to hold a number in between 0 and 255i.e. Through 256 different patterns, we deserve to store a number in the selection 0..255 Really an excellent for save on computer characters/letters.

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## Bytes

"Byte" - unit of details storageA document, one image, a movie .. How numerous bytes?1 byte is sufficient to hold about 1 typed character, e.g. "b" or "X" or "\$"All storage is measure in bytes, despite being an extremely different hardwareKilobyte, KB, about 1 thousand bytesMegabyte, MB, around 1 million bytesGigabyte, GB, around 1 billion bytesTerabyte, TB, about 1 sunshine bytes (rare)

## Bytes and also Characters - ASCII Code

ASCII is an encoding representing every typed character by a numberEach number is save in one byte (so the number is in 0..255)A is 65B is 66a is 96space is 32"Unicode" is one encoding because that mandarin, greek, arabic, etc. Languages, frequently 2-bytes per "character"
 32 space33 !34 "35 #36 \$37 %38 &39 "40 (41 )42 *43 +44 ,45 -46 .47 /48 049 150 251 352 453 554 655 756 857 958 :59 ;60 63 ?64 65 A66 B67 C68 D69 E70 F71 G72 H73 I74 J75 K76 L77 M78 N79 O80 P81 Q82 R83 S84 T85 U86 V87 W88 X89 Y90 Z91 <92 93 >94 ^95 _96 ` 97 a98 b99 c100 d101 e102 f103 g104 h105 i106 j107 k108 l109 m110 n111 o112 p113 q114 r115 s116 t117 u118 v119 w120 x121 y122 z123 125 126 ~

## Typing, Bytes, and also You

Each letter is save on computer in a byte, as below100 typed letter takes up 100 bytesWhen you send, say, a message message, the numbers space sentText is rather compact, using couple of bytes, contrasted to images etc.