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Representing Characters in a computer

Representing Characters in a computer Pressing a key on the computer a code is generated that the computer can convert into a symbol for displaying or printing. Standards were required to make sure computers used the same codes for the characters.

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Representing Characters in a computer

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  1. Representing Characters in a computer • Pressing a key on the computer a code is generated that the computer can convert into a symbol for displaying or printing. • Standards were required to make sure computers used the same codes for the characters. • ASCII was set up – American Standard Code for information Interchange.

  2. Representing Characters in a computer • ASCII Represents: • 127 Codes – requiring 7 bits • 8 bit computers allowed an extra bit to store more mathematical characters • Numerical values allow comparisons to sort data

  3. Representing Characters in a computer • Unicode uses 32 bits allowing 4 billion possibilities – which includes multiple languages and characters. ASCII is a subset of Unicode.

  4. Representing Characters in a computer • Read page 78 – 79 • Answer questions on page 79

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