1.4.1 - Data types

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4 Terms

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What is the difference between twos complement and sign magnitude

Sign magnitude - first digit = - or +

Twos complement - first digit = -2 or 0 -64 or 0 ect

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What are the character sets used for characters

ASCII

Unicode

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What is ASCII

American standard code for information interchange

Use 7 bits to represent 2^7 = 128 different characters

Capital letters are represented by codes

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What is unicode

Unicode uses a varying number of bits allowing for over 1 million characters and so unicode can represent many different languages, symbols and emoji