Computer Science 1033A/B Lecture Notes - Lecture 3: Octal

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Laura Reid

Document Summary

Zeros beside number do not change the value of the number. Binary means there"s two options, either off or on. Days of the week but not the months of the year. Byte - breaks down into 8 bits, 8 digits of binary. Watch: english computer science unplugged - part 1 binary - 2005. If the digit is 1, get the place value of the digit and calculate 2 to the power of that place value. Note: the place values always begin with the right most digit at 0. ^these red numbers represent each digits place value. Now we raise 2 to the power of the place value for each of the 1"s. The first 1 has place value 3, so take 2^3 = 8. The next 1 has a place value of 0 so that 2^0 = 1. Now add them together 8 + 1 = 9. The three 1s are at place values 2, 1, and 0.