1 00:00:01,560 --> 00:00:01,850 Hi. 2 00:00:01,890 --> 00:00:06,490 Even so in this lesson we are going to learn how we can initialize our metrics. 3 00:00:06,510 --> 00:00:10,800 Or you can say to damage and Larry. 4 00:00:11,000 --> 00:00:13,340 So how do we initialize our one theory. 5 00:00:13,370 --> 00:00:18,400 So we write like this and then let's say four elements and I will give four values. 6 00:00:18,410 --> 00:00:21,660 That's a one two three and four. 7 00:00:21,680 --> 00:00:24,140 So this is the way for initializing a the array. 8 00:00:24,170 --> 00:00:27,350 Now how we can initialize our to the area. 9 00:00:27,350 --> 00:00:29,300 So I will write like this. 10 00:00:29,540 --> 00:00:31,880 I want to create a truly array of integers. 11 00:00:31,880 --> 00:00:38,420 Many of the array number of rows and columns letter to roots and three columns and I will initialize 12 00:00:38,480 --> 00:00:39,140 it like this. 13 00:00:39,140 --> 00:00:42,480 So I will give one two entry. 14 00:00:42,550 --> 00:00:44,040 So this is the content. 15 00:00:44,050 --> 00:00:44,740 1 2 and 3. 16 00:00:44,740 --> 00:00:48,040 So this is the content for the first row. 17 00:00:48,040 --> 00:00:49,320 Now I have to give one rule. 18 00:00:49,330 --> 00:00:54,640 So since then I will write 4 5 and 6 19 00:00:57,380 --> 00:00:59,930 so that's how I will initialize my to the area. 20 00:01:00,770 --> 00:01:02,280 So this will look like this. 21 00:01:02,300 --> 00:01:04,700 I have two rows and three columns 22 00:01:08,690 --> 00:01:13,930 so in the first row I will fill this element 1 2 3 in the next row. 23 00:01:13,950 --> 00:01:21,050 I will fill these elements forward five and six so it is very simple to initialize I would do the 80 24 00:01:21,920 --> 00:01:27,230 now in to the array basically giving rows is optional. 25 00:01:27,230 --> 00:01:34,240 So giving rows is optional and giving columns is mandatory. 26 00:01:34,260 --> 00:01:40,590 So this is giving columns item mandatory and giving the value of rules out optional. 27 00:01:40,590 --> 00:01:46,220 And we will see why it is so but not in this way a deal probably in the next video. 28 00:01:46,230 --> 00:01:54,270 So basically I can write like this also I want to create a airy I do not want to give rules and again 29 00:01:54,270 --> 00:01:56,920 the columns I mean it is so we have to give columns. 30 00:01:57,150 --> 00:02:07,620 And if I will write like this 120 and let's say in the next row four five six four five six and now 31 00:02:07,830 --> 00:02:08,640 seven eight nine 32 00:02:11,430 --> 00:02:11,650 okay. 33 00:02:11,660 --> 00:02:13,880 So this is not this is only a comma 34 00:02:20,140 --> 00:02:21,180 and then this. 35 00:02:21,190 --> 00:02:23,280 So what will be my final edit. 36 00:02:23,860 --> 00:02:25,810 So how many rules will be there. 37 00:02:25,840 --> 00:02:30,300 So we can figure it out with the help of the number of elements that I'm trying to insert. 38 00:02:30,460 --> 00:02:36,460 So I will have to use and the number of columns are obviously given three so three rows and three columns 39 00:02:37,620 --> 00:02:39,080 what is the content of the first rule. 40 00:02:39,090 --> 00:02:40,880 It is 1 2 3. 41 00:02:41,000 --> 00:02:47,930 What is the content for the second group 4 5 6 and what is the content for the third 2 7 8 9 so that 42 00:02:47,960 --> 00:02:50,160 is the meaning of giving it all this is optional. 43 00:02:50,180 --> 00:02:56,990 Giving rules is optional but giving the number of columns in a duty Eddy is mandatory. 44 00:02:56,990 --> 00:03:03,920 Now let's say Now tell me what will happen if I try and do something like this into V I do not want 45 00:03:03,920 --> 00:03:09,580 to give the number of flues but I want to give the number of columns which are totally and what is my 46 00:03:09,580 --> 00:03:10,100 content. 47 00:03:10,120 --> 00:03:14,670 So let's say 1 2. 48 00:03:14,910 --> 00:03:26,600 Now let's say 2 4 5 and now let's say 7 and 8. 49 00:03:26,630 --> 00:03:28,860 So what will be my duty. 50 00:03:29,750 --> 00:03:32,060 So 1 2 and 3. 51 00:03:32,060 --> 00:03:36,800 So first of all I will have clear rules and the number of columns I've given three. 52 00:03:36,890 --> 00:03:42,430 So this is two cross three three cross three. 53 00:03:42,430 --> 00:03:44,320 What is the content for the festival. 54 00:03:44,380 --> 00:03:47,710 The content for the first ROIs 1 2 1 and 2. 55 00:03:47,830 --> 00:03:51,610 What is the content for the second 2 3 4 and 5. 56 00:03:51,640 --> 00:03:57,940 What is the content for the third row 7 and 8 and what will happen to the values which are not provided 57 00:03:57,940 --> 00:03:58,510 by the user. 58 00:03:58,540 --> 00:04:03,360 So I will put zero there so this is just like one diary. 59 00:04:03,380 --> 00:04:10,070 So in one diary if you will do something like this a 0 4 and you give only one value let's say 1 or 60 00:04:10,070 --> 00:04:13,000 do you give 2 values then what will happen. 61 00:04:13,010 --> 00:04:20,580 So basically you will get four boxes and inside the first row box then the values will be went in two 62 00:04:20,580 --> 00:04:22,810 and rest the values will become zero. 63 00:04:22,830 --> 00:04:24,570 So that is what happening here. 64 00:04:24,570 --> 00:04:27,220 All the values which apply which I will not provide. 65 00:04:27,230 --> 00:04:31,160 They will automatically become zero simple. 66 00:04:31,350 --> 00:04:32,950 So let's take one more example. 67 00:04:34,020 --> 00:04:41,420 So let's say if I would lose something like this I want to create a duty at let's say 5 loosely worded 68 00:04:41,500 --> 00:04:49,000 and 4 columns are going to be presented and I give value like this one and two and then I give three 69 00:04:49,000 --> 00:04:52,060 and four. 70 00:04:52,090 --> 00:04:54,590 So what will happen. 71 00:04:54,650 --> 00:05:02,500 So first of all I am going to have five rules and there will be four columns so first rule second rule 72 00:05:03,620 --> 00:05:12,460 third rule fourth and fifth rule and this is first column second the third and fourth column. 73 00:05:12,510 --> 00:05:14,070 So what is the content for the first rule. 74 00:05:14,070 --> 00:05:15,430 This is one in two. 75 00:05:15,480 --> 00:05:16,920 What is the content for the second rule. 76 00:05:16,920 --> 00:05:18,200 This is three and four. 77 00:05:18,540 --> 00:05:21,820 And what will happen to all the all these black boxes. 78 00:05:21,840 --> 00:05:23,350 So they will become zero. 79 00:05:23,550 --> 00:05:25,740 So zero will be placed every year 80 00:05:31,170 --> 00:05:37,090 so this is the desired so I hope you understood. 81 00:05:37,150 --> 00:05:42,890 Now I want to initialize my complete Matrix complete to the area with all the zeros. 82 00:05:43,060 --> 00:05:45,280 So for example what I want to say here is 83 00:05:49,520 --> 00:05:52,910 so how do you create an array with all the zeros. 84 00:05:53,000 --> 00:05:54,950 How to initialize an array with all the. 85 00:05:54,950 --> 00:05:59,530 Also you will have to write something like this in D3. 86 00:05:59,540 --> 00:06:05,200 Let's say you want to create of size 10 and if you write it like this then what will happen. 87 00:06:05,240 --> 00:06:08,480 So all the elements inside are ready. 88 00:06:08,510 --> 00:06:13,370 So first of all this element is zero so that's why the first element will become detail and the rest 89 00:06:13,370 --> 00:06:17,560 of the elements are going to become zero. 90 00:06:17,570 --> 00:06:21,150 Now I want to initialize my to the area with all the zeros. 91 00:06:21,230 --> 00:06:24,330 Again this index is way too simple. 92 00:06:24,830 --> 00:06:30,890 Let's say 10 goes and 10 columns and you will write it something like this zero. 93 00:06:30,920 --> 00:06:32,520 So what will happen again. 94 00:06:32,540 --> 00:06:36,670 You will get a 10 cost 10 judiciary. 95 00:06:36,970 --> 00:06:39,970 So this is 0 9 and again 0 9. 96 00:06:40,600 --> 00:06:46,030 And all the values inside this truly array will visit was so zero as will be the 97 00:06:51,380 --> 00:06:56,010 so net so we can initialize our duty metrics with all the zeros. 98 00:06:56,150 --> 00:06:57,100 Simple. 99 00:06:57,200 --> 00:07:05,030 So now let us try to print all this because I know we should not trust someone we should write the code 100 00:07:05,030 --> 00:07:13,460 and then we should see what our output will be so let's say okay. 101 00:07:13,470 --> 00:07:17,830 So first of all let us create a function. 102 00:07:17,950 --> 00:07:20,320 So how do we create a function. 103 00:07:20,320 --> 00:07:23,320 So let us create a function print Eddie 104 00:07:28,300 --> 00:07:33,800 so this print data function what it will take it will take. 105 00:07:33,920 --> 00:07:35,080 Obviously the eddy. 106 00:07:35,080 --> 00:07:42,640 So do damage and Eddie will take how many to lose out there and it will take how many columns How did 107 00:07:46,020 --> 00:07:48,490 than what they have to do so let's copy discord 108 00:07:51,480 --> 00:08:00,960 I'm going to print the content of the judiciary revise and now let us comment everything from here. 109 00:08:01,060 --> 00:08:07,030 So what I will do I will not take the input I will just vaguely call the function. 110 00:08:07,030 --> 00:08:07,450 So 111 00:08:10,750 --> 00:08:15,550 let us initialize our Eddie So let's say the. 112 00:08:16,090 --> 00:08:21,100 I do not want to give the number of rows because giving them little photos are optional. 113 00:08:21,100 --> 00:08:27,430 I just want to give the number of columns so noted the number of columns are two correct. 114 00:08:27,430 --> 00:08:29,030 So now let us initialize them in it. 115 00:08:29,050 --> 00:08:34,280 So the first let's say one comma two. 116 00:08:34,400 --> 00:08:50,800 Now let's say I want to give to go my for. 117 00:08:50,900 --> 00:08:51,740 So this is correct. 118 00:08:51,740 --> 00:09:00,200 Now what you have to do so we have to call this function Big Daddy so let's call the function Bring 119 00:09:00,270 --> 00:09:00,820 daddy. 120 00:09:00,930 --> 00:09:02,450 So I have to pass the edit. 121 00:09:02,460 --> 00:09:06,720 So let's pass Eddie so the value of passing the array is exactly the same. 122 00:09:06,720 --> 00:09:11,170 We are passing the Eddy just like we used to pass in one dimension that in just the name of the ad is 123 00:09:11,180 --> 00:09:13,780 in a then how many rows. 124 00:09:13,790 --> 00:09:16,630 So there are two rows and there are two columns. 125 00:09:16,640 --> 00:09:20,910 So the value of eminent in order to commit to correct. 126 00:09:21,050 --> 00:09:23,450 Now one thing so this code is not correct. 127 00:09:23,450 --> 00:09:30,050 Why it is not correct because I told you giving rules are optional but giving columns are mandatory. 128 00:09:30,290 --> 00:09:36,040 So giving column some and it is all this is the same if you want to pass are to really giving columns 129 00:09:36,040 --> 00:09:38,320 are mandatory. 130 00:09:38,350 --> 00:09:44,890 So what I want to say here is just like I told you that when you are creating your to really giving 131 00:09:44,890 --> 00:09:48,610 the values of rules are optional but giving the values of columns are mandatory. 132 00:09:48,610 --> 00:09:51,850 Similarly when you want to pass an edit to a function. 133 00:09:51,850 --> 00:09:55,420 So we want the possibility to a function. 134 00:09:55,420 --> 00:10:05,020 So giving the rules so giving the rules are again optional but giving the number of columns are mandatory 135 00:10:05,870 --> 00:10:07,780 vite is mandatory. 136 00:10:07,780 --> 00:10:09,280 We will see it in the next review. 137 00:10:09,880 --> 00:10:11,320 So this is too. 138 00:10:11,350 --> 00:10:13,940 So that's why you have to write to here. 139 00:10:13,990 --> 00:10:16,150 OK so let's test our program 140 00:10:24,230 --> 00:10:28,050 so this is my output went to tea and food. 141 00:10:28,060 --> 00:10:36,580 Now let's do some experiments now let's say instead of two if the number of columns out of five. 142 00:10:36,700 --> 00:10:37,920 So what should be an output. 143 00:10:38,290 --> 00:10:43,030 So again if you are making it five then you have to write five here also because the number of columns 144 00:10:43,090 --> 00:10:44,010 should be seen. 145 00:10:44,020 --> 00:10:50,300 So this value and this value they should be same This is the requirement. 146 00:10:50,770 --> 00:10:52,510 And why this is the requirement. 147 00:10:52,510 --> 00:10:54,570 We will see it in the next video. 148 00:10:54,640 --> 00:10:55,990 So let's run our program 149 00:11:03,920 --> 00:11:04,210 OK. 150 00:11:04,220 --> 00:11:14,940 So one thing that I did wrong here is so the number of columns I actually 5 know Let's run again. 151 00:11:14,950 --> 00:11:24,830 So now you can see so there are zeros peasant every year so this will be so 1 and 2 then then the content 152 00:11:24,830 --> 00:11:29,910 of the second draw to you in full and then the all the three rest columns will become zero. 153 00:11:29,910 --> 00:11:31,390 So this is the output. 154 00:11:31,530 --> 00:11:32,230 Correct. 155 00:11:32,250 --> 00:11:37,780 And again I'm repeating myself giving the value of columns are mandatory Vitus mandatory we will see 156 00:11:37,780 --> 00:11:38,640 it in the next redo. 157 00:11:38,640 --> 00:11:40,170 So you have to 5. 158 00:11:40,170 --> 00:11:43,250 So this value and this value they should match. 159 00:11:43,260 --> 00:11:45,270 Otherwise you get output will be wrong 160 00:11:48,700 --> 00:11:52,030 now let's say. 161 00:11:52,120 --> 00:11:55,170 Now let's say the number of rules are also five. 162 00:11:55,180 --> 00:11:59,940 So if the number of rows at five let's change let's make five here. 163 00:12:00,400 --> 00:12:02,350 So now let's try to test our program 164 00:12:09,080 --> 00:12:19,200 so see there are you peasant every year so let me explain this output to you so again there are five 165 00:12:19,200 --> 00:12:27,610 rules in five columns so you will get a five Gross five metrics the content of the first rule is 1 and 166 00:12:27,610 --> 00:12:35,190 2 the of the second choice 2 and 4 rest they will be zeros every year so zeros zeros and zeros. 167 00:12:35,190 --> 00:12:43,560 So that's why you can see how many zeros are there and can we initialize our duty metrics with zeros. 168 00:12:43,560 --> 00:12:46,140 Yes we definitely we can. 169 00:12:46,140 --> 00:12:48,780 So how do we initialize our duty metrics with zeros. 170 00:12:48,810 --> 00:12:55,100 So let us create an identity let's say it b number of rows again optional. 171 00:12:55,100 --> 00:13:01,600 Let's say there are five rows and five columns and I want to initialize my David all Aussie rules so 172 00:13:01,600 --> 00:13:02,620 I will write to zero here. 173 00:13:02,630 --> 00:13:07,170 Simple and I will call. 174 00:13:07,170 --> 00:13:08,920 I will pass B at a 175 00:13:13,050 --> 00:13:21,940 so you can see Zoe's present every viewer so in this we do we learned two important things first thing 176 00:13:21,940 --> 00:13:27,070 is basically how to initialize our duty metrics how do initialize our to the data. 177 00:13:27,070 --> 00:13:32,140 We learned how we can initialize over to the idea and the second thing is basically venue initializing 178 00:13:32,140 --> 00:13:37,030 the to the edit giving the value of rules are optional but giving the values of columns are mandatory. 179 00:13:37,030 --> 00:13:44,990 Similarly when you are passing so when you are passing your 2D Eddie to a function then the number of 180 00:13:44,990 --> 00:13:45,440 rows. 181 00:13:46,460 --> 00:13:52,280 So the value of you can give rows but giving the value of column side mandatory. 182 00:13:53,360 --> 00:13:58,970 So when you are passing function and you are passing to the idea to a function so giving the value of 183 00:13:58,970 --> 00:14:01,010 columns are mandatory. 184 00:14:01,040 --> 00:14:08,770 So this is mandatory and their value should be same and giving that value for was not optional. 185 00:14:08,770 --> 00:14:12,690 So this is optional. 186 00:14:12,740 --> 00:14:18,620 Now the next we do we will discuss why giving the value of columns are mandatory. 187 00:14:18,620 --> 00:14:20,810 So I will see you in the next one but by.