1 00:00:03,040 --> 00:00:03,700 Hi, guys. 2 00:00:03,940 --> 00:00:04,570 Welcome back. 3 00:00:05,230 --> 00:00:07,420 In this we do we will learn two more things. 4 00:00:08,170 --> 00:00:09,880 OK, so let's get started. 5 00:00:11,380 --> 00:00:12,880 First, let us write some called. 6 00:00:15,780 --> 00:00:19,950 Pashing, glued your stream. 7 00:00:22,820 --> 00:00:28,370 Using namespace SDD Samon column. 8 00:00:30,110 --> 00:00:30,890 And man. 9 00:00:35,520 --> 00:00:40,970 And then I'm having done zero, then semicolon. 10 00:00:42,600 --> 00:00:44,340 OK, so just a second. 11 00:00:55,690 --> 00:00:57,230 OK, so let us right some good. 12 00:00:58,340 --> 00:01:00,050 Let us print something, see out. 13 00:01:03,270 --> 00:01:07,480 Iron Man is awesome. 14 00:01:10,670 --> 00:01:13,520 And then seven column C-code. 15 00:01:17,040 --> 00:01:18,030 John Cena. 16 00:01:20,940 --> 00:01:21,740 Is also. 17 00:01:24,310 --> 00:01:24,820 Awesome. 18 00:01:26,470 --> 00:01:27,390 And then Simon Cowell. 19 00:01:29,140 --> 00:01:30,700 OK, so Verlinden. 20 00:01:35,940 --> 00:01:37,110 Iron Man is awesome. 21 00:01:37,140 --> 00:01:39,000 And then John here is also awesome. 22 00:01:39,030 --> 00:01:39,630 Okay, so. 23 00:01:42,150 --> 00:01:45,180 See you out and line. 24 00:01:45,270 --> 00:01:46,180 And then Sam Gordon. 25 00:01:46,260 --> 00:01:51,120 OK, so Bill Denman or this notes, it's looking good. 26 00:01:51,600 --> 00:01:53,550 I on my knees or some Johnson angle was awesome. 27 00:01:54,450 --> 00:01:56,340 And these two lines are by default. 28 00:01:57,540 --> 00:02:05,770 Let's do something more sealed and lane and then some quantum of gas or Blenman. 29 00:02:09,280 --> 00:02:10,460 Now it is looking good. 30 00:02:13,760 --> 00:02:16,580 Okay, so something very, very interesting is going on here. 31 00:02:16,820 --> 00:02:17,500 Let me show you. 32 00:02:20,270 --> 00:02:26,210 If you will look carefully, salmon column, salmon column, salmon column. 33 00:02:26,300 --> 00:02:27,890 And then again, salmon column. 34 00:02:28,970 --> 00:02:31,400 So why am writing salmon column? 35 00:02:32,390 --> 00:02:33,500 So it is just like English. 36 00:02:34,100 --> 00:02:37,250 In English we use full stop in C++. 37 00:02:37,280 --> 00:02:40,040 We use semicolon to tell the compiler. 38 00:02:40,400 --> 00:02:41,330 This line is finished. 39 00:02:41,890 --> 00:02:42,170 Okay. 40 00:02:42,890 --> 00:02:46,940 So say McCollom is used to tell the compiler that this line is finished. 41 00:02:47,570 --> 00:02:50,210 Okay, so what if I remove semicolon for example. 42 00:02:50,210 --> 00:02:51,610 What if I will not write them. 43 00:02:51,980 --> 00:02:52,760 And what will happen. 44 00:02:53,510 --> 00:02:55,070 Compiler will show me edit. 45 00:02:56,060 --> 00:02:57,260 Okay, so let's test it. 46 00:02:58,760 --> 00:03:00,110 So remove the semicolon. 47 00:03:01,120 --> 00:03:02,000 Build Bendern. 48 00:03:04,780 --> 00:03:09,010 So the compiler is showing me an ad and you can read that a statement here. 49 00:03:10,850 --> 00:03:13,320 An expected semicolon before she out. 50 00:03:13,510 --> 00:03:15,630 OK, so we have to write some in column. 51 00:03:15,660 --> 00:03:17,490 Otherwise, Compiler will show us error. 52 00:03:17,990 --> 00:03:21,780 OK, so let us add seven column and then build and then. 53 00:03:25,100 --> 00:03:26,740 So it is running perfectly fine. 54 00:03:28,990 --> 00:03:30,430 So I want to read one thing here. 55 00:03:33,260 --> 00:03:33,830 Do not 56 00:03:36,420 --> 00:03:45,140 forget to ride Salmon Quillen, otherwise 57 00:03:47,330 --> 00:03:48,170 compiler 58 00:03:50,870 --> 00:03:57,440 will show us how to otherwise come, Bilad will show us edit. 59 00:04:01,210 --> 00:04:03,210 OK, so I want to read this line. 60 00:04:04,150 --> 00:04:04,810 But why? 61 00:04:05,530 --> 00:04:11,170 Because later on, when you will see this code, you can easily figured out that it is important to 62 00:04:11,170 --> 00:04:11,940 read semicolon. 63 00:04:12,040 --> 00:04:13,720 Otherwise, compiler will show us error. 64 00:04:14,170 --> 00:04:15,940 So I want to convey this message to you. 65 00:04:16,230 --> 00:04:16,550 OK. 66 00:04:17,020 --> 00:04:18,310 So let's be Landen. 67 00:04:21,970 --> 00:04:23,840 OK, so the compiler is showing me errors. 68 00:04:24,040 --> 00:04:25,060 And what is there statement? 69 00:04:26,170 --> 00:04:29,380 You can read it here do was not declared in this code. 70 00:04:30,010 --> 00:04:31,330 So basically, what is happening? 71 00:04:34,700 --> 00:04:40,450 OK, so we warned that this land should be visible to us, but C++ compiler Shoura in ordered. 72 00:04:41,120 --> 00:04:42,440 So how can we do that? 73 00:04:42,950 --> 00:04:44,240 So the idea is very simple. 74 00:04:44,690 --> 00:04:46,400 Just put two forward slash. 75 00:04:47,850 --> 00:04:49,730 No compiler will ignore this line. 76 00:04:50,320 --> 00:04:50,560 Okay. 77 00:04:50,990 --> 00:04:56,060 So I can say this line, you can see this line, but C++ compiler cannot see this line. 78 00:04:57,110 --> 00:04:57,350 OK. 79 00:04:57,640 --> 00:04:59,440 So this thing is called comments. 80 00:05:02,670 --> 00:05:04,860 So this thing is called comments. 81 00:05:08,660 --> 00:05:10,820 OK, so this line is visible to me. 82 00:05:11,090 --> 00:05:15,290 This line is visible to you, but this line is not visible to C++. 83 00:05:16,020 --> 00:05:18,410 OK, so the compiler will ignore this line. 84 00:05:23,560 --> 00:05:24,960 OK, so and. 85 00:05:28,850 --> 00:05:33,020 And my court is perfectly fine, C++ is ignoring that line. 86 00:05:33,220 --> 00:05:33,450 OK. 87 00:05:35,330 --> 00:05:36,730 So one obvious question here. 88 00:05:36,890 --> 00:05:38,120 Why we use comments. 89 00:05:40,280 --> 00:05:45,020 We use comments because with the help of comments, our court becomes easier to understand. 90 00:05:45,980 --> 00:05:51,680 So going forward, we will be writing lots of comments so that it becomes easier to understand whatever 91 00:05:51,680 --> 00:05:52,430 court is doing. 92 00:05:53,880 --> 00:05:55,520 OK, OK. 93 00:05:55,590 --> 00:05:56,910 So how do I recommend. 94 00:05:58,200 --> 00:06:01,410 Just put forward slash and write whatever you want. 95 00:06:02,250 --> 00:06:08,910 So this is called single line comment. 96 00:06:10,190 --> 00:06:10,410 OK. 97 00:06:10,710 --> 00:06:12,240 So this is only a single line. 98 00:06:12,250 --> 00:06:13,650 We can only write a single line. 99 00:06:14,680 --> 00:06:20,230 So what if I want to make a paragraph as a comment, I want to write a paragraph as a comment. 100 00:06:20,980 --> 00:06:21,970 So there are two ways. 101 00:06:22,260 --> 00:06:22,780 So the first. 102 00:06:26,690 --> 00:06:26,990 OK. 103 00:06:27,340 --> 00:06:28,300 So the first way's. 104 00:06:29,720 --> 00:06:30,150 Right. 105 00:06:30,310 --> 00:06:32,840 Do for reflection in the beginning of each lane. 106 00:06:33,050 --> 00:06:34,040 And the second ways. 107 00:06:35,240 --> 00:06:36,290 So this is my paragraph. 108 00:06:36,350 --> 00:06:43,120 The Second Way's multiple line comments just put a beginning and end. 109 00:06:44,030 --> 00:06:46,700 So this is called multi lang comments. 110 00:06:47,390 --> 00:06:49,930 So all this thing will be a part of comment. 111 00:06:50,870 --> 00:06:53,470 So my entire paragraph will be a comment now. 112 00:06:53,700 --> 00:06:56,940 OK, so let me demonstrate to. 113 00:07:02,460 --> 00:07:03,790 And now whatever he will write. 114 00:07:05,570 --> 00:07:06,760 It becomes a comment. 115 00:07:09,500 --> 00:07:15,080 You can see here, Redan zero also becomes a comment, so for ending the comment, what will I do? 116 00:07:17,090 --> 00:07:18,260 So this is my kind. 117 00:07:18,600 --> 00:07:20,180 Okay, so let's. 118 00:07:20,210 --> 00:07:20,840 Ballenden. 119 00:07:24,940 --> 00:07:25,660 I put this. 120 00:07:25,690 --> 00:07:26,910 Hundred percent correct. 121 00:07:29,740 --> 00:07:31,600 OK, so that is all for this we do. 122 00:07:31,930 --> 00:07:32,800 Thanks for watching.