Week2

Before the teacher teach me the new lecture, she checks who doesn't create the blog yet. The new lecture is computer hardware basics : Number systems include decimal, binary, octal and hexadecimal. First of all, she talk about decimal number systems. The values of its are 0,1,2,3,4,5,6,7,8, and 9. Decimal numbers have a radix of ten. Secondly, she continue to talk about others number systems. There are binary number systems. Binary number systems are different with decimal number systems. Binary just uses 2 digits to form a string of numbers. They are 0 and 1. It has a radix of two. After that, octal number systems are talked as the third number systems. It uses eight numerals, they are 0,1,2,3,4,5,6 and 7. Octal numbers have a radix of eight. The last number systems are hexadecimal number systems. It uses sixteen symbols (numerals + letters) to form a string of numbers. They are 0,1,2,3,4,5,6,7,8,9,A,B,C,D and E. It have a radix of sixteen. The last part of my class is some conversion between binary, decimal, octal and hexadecimal number systems.