CS100 Lecture Notes - Lecture 3: Binary Number, Hexadecimal, Extended Ascii
25 Oct 2017
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Document Summary
Digital discrete is anything that can be counted is discrete(discretization) (i. e currency) Continuous is that the number can be in nite precision(lots of decimal places), time,degree,light. It is physically impossible for a digital computer to represent a continuous value with in nite precision. The computer has a xed number, has to have a digital number, Electronic switches represent(off and on) which is 1 and 0, computer actually have billion switches, Primary way that the switches are used for: logic, memory. Byte: 8 bits (8 switches) memory is stored in bits. Each byte can store one of 256 possible values (2^8) The decimal number system is also known as a base 10 system. Binary digits only have 2 digits: one and zero (base 2) 207(decimal)-11001111(binary) how to convert from binary to decimal? you add the numbers together decimal to binary subtract : Hex to binary: each hex = 4 binary number.
