EECS 1520 Lecture Notes - Extended Ascii, Moodle

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520

Document Summary

Need to represent every character in a document. List them all and assign each a binary string. Character set is a list of characters and the codes used to represent each one. Experts in the computer industry agree on the specifics of a character set, thereby creating a standard for sharing data. Ascii originally used seven bits to represent each character, allowing for 128 unique characters. Later extended ascii evolved so that all eight bits were used. First 32 are control characters(or hidden characters); they control how text appears, but do not appear as text. Decimal arabic numbers (i. e. , 0, 1, 2, etc. ) start at code 48 e. g. , the code for 6 is 48 + 6 = 54. Uppercase roman letters (i. e. , a, b, c, etc. ) start 65 e. g. , the code for j (10thletter) is 65 + (10 1) = 74.