01:198:170 Lecture 3: CS170-Lecture 3- Representing Information Digitally

• School: Rutgers University
• Department: Computer Science
• Course: 01:198:170
• Professor: D Nesci

Document Summary

Digitizing doesn"t require just digits- any set of symbols will do. Fundamental patterns on which all information technology is built. These two patterns make it a binary system. Ex: hole in punch card-1, no hole-0. Each digit is also known as a bit. Bits and bytes= atoms & molecules of information combine to form our virtual world of computation, information & communication. Bits are often common denominations of memory in computers. Decimals- not actual decimals, are whole numbers/integers. Start from right to left (not like normal reading- left to right) Begin with 2^0 (not 2^1)-- binary so use power of 2. Only add up powers of 2 that have a 1 for the original number (0*2^2= 0) Hint: if there"s a 1 in the last position odd answer. Add up numbers: 16+8+2+1=27 (ignore the spot with the 0) Add up numbers: 8+2+1= 11 (ignore spots with 0) Based upon powers of 2 and the closest value.