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

You are watching: A collection of 8 bits is called a

Bit

a "bit" is atomic: the the smallest unit the storageA bit stores simply a 0 or 1"In the computer system it"s all 0"s and 1"s" ... BitsAnything through two different states have the right to store 1 bitIn a chip: electrical charge = 0/1In a tough drive: point out of North/South magnetism = 0/1A little is too tiny to be much useGroup 8 bits with each other to make 1 byteEverything in a computer is 0"s and 1"s. The bit stores simply a 0 or 1: it"s the smallest structure block the storage.

Byte

One byte = arsenal of 8 bitse.g. 0 1 0 1 1 0 1 0One byte have the right to store one character, e.g. "A" or "x" or "$"

How many Patterns through N Bits? (demo)

How countless different patterns have the right to be made with 1, 2, or 3 bits?Number of bits different 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 can only it is in 0 or 1Leftmost little is 0, climate append 2-bit patternsLeftmost bit is 1, climate append 2-bit trends again3-bits has twice as plenty of 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: include 1 bit, twin the variety of patterns1 little bit - 2 patterns2 bits - 4 3 bits - 84 bits - 165 bits - 326 bits - 647 bits - 1288 bits - 256 - one byteMathematically: n bits returns 2n trends (2 to the nth power)

One Byte - 256 patterns (demo)

1 byte is group of 8 bits8 bits can make 256 various patternsHow to use the 256 patterns?How to save a number in a byte?Start through 0, go up, one pattern every number, until run the end of patterns0, 1, 2, 3, 4, 5, ... 254, 255One byte deserve to hold a number in between 0 and also 255i.e. Through 256 different patterns, we have the right to store a number in the variety 0..255 Really good for save on computer characters/letters.

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Bytes

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

Bytes and also Characters - ASCII Code

ASCII is one encoding representing each typed personality by a numberEach number is save on computer in one byte (so the number is in 0..255)A is 65B is 66a is 96space is 32"Unicode" is one encoding for mandarin, greek, arabic, etc. Languages, typically 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 stored in a byte, as below100 typed letters takes up 100 bytesWhen friend send, say, a message message, the numbers room sentText is rather compact, using few bytes, contrasted to photos etc.typed letter correspond come bytes in RAM

Numbers in Computers