CMPT 120 Lecture Notes - Lecture 15: Octal, 5,6,7,8

• School: Simon Fraser University
• Department: Computing Science
• Course: CMPT 120
• Professor: Liaqat Ali

Document Summary

Data inside computer is not represented the same way as we represent numbers and letters in. We represent quantities using symbols (digits) 0, 1, 3, and 9. We can write names using english letters a, b, c,z or a, b, c,z. Computer don t use (recognize) the symbols 0,1,29 or alphabets a, b, c,z. Because, computers use a completely different language to represent numbers or letters (or data). We call it machine language. (or, binary language or representation. ) The binary language consists of two symbols only: 0 and 1. That means, everything in computer must be represented using the symbols 0 and 1, only. So, the quantity six must be represented using a combination of 0s and 1s. Ascii: american standard code for information interchange. (256 codes. ) Used in computers to represent characters since 1963. Ascii uses 8-bits to represent one character of english language. Space required to represent a single binary 0 or 1 is called bit.