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

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Bit

a "bit" is atomic: the smallest unit the storageA little stores just a 0 or 1"In the computer system it"s every 0"s and also 1"s" ... BitsAnything with two separate states deserve to store 1 bitIn a chip: electric charge = 0/1In a hard drive: point out of North/South magnetism = 0/1A little bit is too small to be much useGroup 8 bits together to make 1 byteEverything in a computer is 0"s and 1"s. The bit stores just a 0 or 1: it"s the smallest structure block of storage.

Byte

One byte = collection 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 numerous Patterns with N Bits? (demo)

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

One Byte - 256 fads (demo)

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

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Bytes

"Byte" - unit of information storageA document, an image, a movie .. How numerous bytes?1 byte is enough to hold around 1 typed character, e.g. "b" or "X" or "$"All warehouse is measure in bytes, despite being very different hardwareKilobyte, KB, about 1 thousand bytesMegabyte, MB, around 1 million bytesGigabyte, GB, around 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 stored in one byte (so the number is in 0..255)A is 65B is 66a is 96space is 32"Unicode" is an encoding because that 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 girlfriend send, say, a text message, the numbers space sentText is rather compact, using couple of bytes, compared to pictures etc.typed letter correspond to bytes in RAM

Numbers in Computers