EECS 1520 Lecture 4: Lec #4

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

Document Summary

Can rep text in computer linearly by using binary code. We have to have a standard character set: ascii is mainly for english. Extended it to 8 bits (1 byte) Gives a pattern and tells us what character its represents. All characters are rep by 8 bits. Control characters role is to control the appearance of the text: symbol itself doesn"t show up (i. e. spacing) Lower case a is 32 more than uppercase a. Characters are represented by 2 hexadecimal digits. This was for making text in different languages. Needed more than 1 byte, so used 2 bytes: now can represent 2^16 characters = roughly 65 000. Now use 4 bytes: 2^32 characters now available, now can represent different languages as well as emojis. Rst portion of unicode is exactly like ascii. Type of system may change the appearance of the emoji but the overall look is the same.