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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:06,930 --> 00:00:08,460 What is computer science? 2 00:00:09,060 --> 00:00:13,560 Let's start by saying that computer science is the science of computers. 3 00:00:14,250 --> 00:00:20,550 To expand on that, computer science is defined as the study of computers and computational systems 4 00:00:20,760 --> 00:00:26,220 and deals with the theory, design, development and application of software. 5 00:00:26,790 --> 00:00:30,780 Computer science shares ties to its cousin subjects, math and physics. 6 00:00:31,020 --> 00:00:37,530 And often people interested in computer science are also passionate about math, physics or both. 7 00:00:38,040 --> 00:00:40,020 In order to study computer science. 8 00:00:40,140 --> 00:00:42,540 You need to be able to communicate with the computer. 9 00:00:43,110 --> 00:00:44,550 We do this by programming. 10 00:00:45,090 --> 00:00:46,770 Some people say programming. 11 00:00:46,890 --> 00:00:48,000 Others say coding. 12 00:00:48,150 --> 00:00:49,290 Others say development. 13 00:00:49,530 --> 00:00:51,210 All of this means the same thing. 14 00:00:51,630 --> 00:00:56,880 Writing code that the computer understands in order to perform steps to solve a problem. 15 00:00:57,600 --> 00:01:02,790 An algorithm is a step by step sequence of instructions intended at solving a problem. 16 00:01:03,360 --> 00:01:06,120 Algorithms play a huge part in computer science. 17 00:01:06,210 --> 00:01:11,040 As all developers that write code are essentially writing algorithms that the computer will execute. 18 00:01:11,310 --> 00:01:16,590 Computer science has been around since the mid nineteen hundreds and many of the problems that developers 19 00:01:16,590 --> 00:01:17,880 face repeat themselves. 20 00:01:18,390 --> 00:01:22,170 Therefore, some developers have created what are called design patterns. 21 00:01:22,560 --> 00:01:27,600 General reuseable solutions to commonly occurring problems in software design. 22 00:01:28,170 --> 00:01:33,030 In 1994, one of the most iconic books in all of computer science was published. 23 00:01:33,300 --> 00:01:37,860 Named Design Patterns Elements of reusable object oriented software. 24 00:01:38,250 --> 00:01:42,630 It was written by four great software engineers nicknamed the Gang of Four. 25 00:01:42,840 --> 00:01:48,390 Inside of this book, there are 23 design patterns which have become the core concepts for computer 26 00:01:48,390 --> 00:01:51,630 science and software engineering in the 21st century. 27 00:01:52,110 --> 00:01:57,480 And this course, you will learn all twenty three of those design patterns and how to implement them 28 00:01:57,480 --> 00:01:58,260 in C Sharp. 29 00:01:58,710 --> 00:02:01,680 How does a person communicate their intent to a computer? 30 00:02:02,250 --> 00:02:03,130 Believe it or not. 31 00:02:03,150 --> 00:02:06,930 Computers only understand two characters, zeros and ones. 32 00:02:07,290 --> 00:02:10,560 They don't know any other numbers, letters or symbols. 33 00:02:11,040 --> 00:02:13,200 Zeros and ones are called binary code. 34 00:02:13,560 --> 00:02:18,930 The language of the computer programming languages interface between us and the computer. 35 00:02:19,260 --> 00:02:25,380 We write code that then compiles down into zeros and ones before it is executed by the computer. 36 00:02:25,950 --> 00:02:30,570 There are so many programming languages out there that you can use to communicate with the computer 37 00:02:30,660 --> 00:02:33,900 and write algorithms through code that the computer can execute. 38 00:02:34,140 --> 00:02:39,060 C Sharp is one of the most popular programming languages in the world and there's the one that we will 39 00:02:39,060 --> 00:02:41,370 use in this course in the next lecture. 40 00:02:41,700 --> 00:02:43,860 We will learn what computer programming is. 4040

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