Data Encoding Characters.

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Presentation transcript:

Data Encoding Characters

ASCII Question: What is the ASCII code for C? Computers have to be able to represent letters and symbols as well as numbers. Basically, the idea is to give each character a number as a code and store the codes and their meanings in a table. A common code is ASCII - the American Standard Code for Information Interchange. Symbol Binary A 0100 0001 B 0100 0010 C 0100 0011 D 0100 0100 E 0100 0101 F 0100 0110 This uses seven bits to store characters. Seven bits is enough to code 128 different characters. Question: What is the ASCII code for C? Complete tasks 6.1 to 6.5.

Unicode Unicode is an alternative encoding system. It uses 16 bits to encode each character and is therefore able to represent far more characters than ASCII (over 65,000).