1 00:00:00,350 --> 00:00:02,930 And and then I want to actually show that value to you. 2 00:00:02,970 --> 00:00:03,600 OK. 3 00:00:03,990 --> 00:00:09,130 So here I can just refer to the name of this total of value here. 4 00:00:09,400 --> 00:00:11,830 OK total value assignment operator. 5 00:00:12,180 --> 00:00:19,890 And then I can just again refer to the name of this total value plus integer array sup index. 6 00:00:20,470 --> 00:00:20,930 OK. 7 00:00:21,000 --> 00:00:26,280 So here as you can see first of all I am actually referring to the name of the total value. 8 00:00:26,400 --> 00:00:31,320 Valuable as you can see here this is my total value variable and this variable is actually of type integer. 9 00:00:31,350 --> 00:00:34,990 OK I actually put an assignment operator. 10 00:00:35,040 --> 00:00:37,340 So you want to actually assign a value to this rally. 11 00:00:37,410 --> 00:00:38,080 OK. 12 00:00:38,520 --> 00:00:40,970 And again I referred to the name of this variable. 13 00:00:40,970 --> 00:00:46,530 In order to refer to the value that is inside of this variable OK plus. 14 00:00:46,860 --> 00:00:49,620 OK this is a plus operator integer. 15 00:00:49,750 --> 00:00:50,620 Sub index. 16 00:00:50,640 --> 00:00:56,250 So this integer and a sub index is going to actually give me the values that are actually specific to 17 00:00:56,250 --> 00:00:58,690 the specific index of this array. 18 00:00:58,710 --> 00:01:03,840 OK so for example the first time that this loop is going to be executed the value of this index right 19 00:01:03,840 --> 00:01:04,630 here is zero. 20 00:01:04,650 --> 00:01:05,080 OK. 21 00:01:05,100 --> 00:01:09,200 And then it's going to check this condition and 0 is less than the length of this error. 22 00:01:09,210 --> 00:01:09,640 OK. 23 00:01:09,660 --> 00:01:14,120 As you can see here it's going to actually go inside these for a loop and then it's going up. 24 00:01:14,130 --> 00:01:16,210 Put this number zero here. 25 00:01:16,260 --> 00:01:16,680 OK. 26 00:01:16,720 --> 00:01:18,960 So integer array index 0. 27 00:01:19,080 --> 00:01:21,800 OK because the value of this index is zero OK. 28 00:01:22,050 --> 00:01:25,380 So the value of the integer RASM index is. 29 00:01:25,380 --> 00:01:29,730 Number two this value here is index 0 of this array. 30 00:01:29,870 --> 00:01:34,320 OK so the value of this index 0 of this array is number two. 31 00:01:34,560 --> 00:01:39,340 OK so number two plus number 0 as you can see here number two. 32 00:01:39,450 --> 00:01:42,920 So that's number two is going to be assigned to this total value. 33 00:01:42,960 --> 00:01:43,360 OK. 34 00:01:43,410 --> 00:01:48,330 And the second time that this loop is going to be executed the value of this total value is actually 35 00:01:48,330 --> 00:01:48,700 two. 36 00:01:48,780 --> 00:01:49,470 OK. 37 00:01:49,750 --> 00:01:55,780 So and as you can see here the value of this index value is actually incremented by 1. 38 00:01:55,800 --> 00:02:01,520 So now the value of this index variable is 1 and it's going to again checked this condition. 39 00:02:01,800 --> 00:02:04,690 So index is less than integer read that Len. 40 00:02:04,950 --> 00:02:05,720 That's true. 41 00:02:05,790 --> 00:02:08,400 So it's not actually going to like this for a loop. 42 00:02:08,430 --> 00:02:11,610 And as you can see here now the value of this total value is two. 43 00:02:11,610 --> 00:02:12,130 OK. 44 00:02:12,240 --> 00:02:15,920 So two plus integers are a sub index. 45 00:02:15,960 --> 00:02:21,990 So the value of this index now is number one integer average stock index as you can see the index is 46 00:02:21,990 --> 00:02:22,710 now number one. 47 00:02:22,710 --> 00:02:29,550 So this is index number one here inside this integer array and the value that is inside of the index 48 00:02:30,000 --> 00:02:33,280 one of this integer is number 54. 49 00:02:33,540 --> 00:02:38,460 OK so two plus 54 is 56 and that's 56. 50 00:02:38,580 --> 00:02:41,930 Value is going to be assigned to the total value. 51 00:02:42,090 --> 00:02:42,800 OK. 52 00:02:43,200 --> 00:02:48,930 And then it's going to actually continue executing this follow up until this condition evaluates to 53 00:02:48,930 --> 00:02:55,300 false and the value of this in the index variable is not less than integer R8 of lead. 54 00:02:55,350 --> 00:03:00,180 And then it's going to actually skip this for a loop and then execute the lines of code that are actually 55 00:03:00,180 --> 00:03:01,890 after this for loop OK. 56 00:03:01,890 --> 00:03:04,760 So let's actually output this value. 57 00:03:04,770 --> 00:03:07,950 This total value to the screen and let's see what happens. 58 00:03:08,130 --> 00:03:11,340 The total that said text. 59 00:03:11,490 --> 00:03:16,680 And here I need to actually refer to the name of this total value valuable plus to double quotes in 60 00:03:16,680 --> 00:03:20,070 order to actually convert this value to our string value. 61 00:03:20,070 --> 00:03:20,520 OK. 62 00:03:20,580 --> 00:03:23,380 So that we can see that value here. 63 00:03:23,610 --> 00:03:24,690 Inside of this script. 64 00:03:24,700 --> 00:03:25,090 OK. 65 00:03:25,170 --> 00:03:29,020 So let's actually run our project and see what happens. 66 00:03:29,070 --> 00:03:31,940 Our application is actually running on this emulator here. 67 00:03:32,070 --> 00:03:36,060 And you can see that the total value of the array is free hundred and fifty five. 68 00:03:36,090 --> 00:03:36,480 OK. 69 00:03:36,480 --> 00:03:42,980 We actually added the values of this of this array together and the total value of this array is free. 70 00:03:42,980 --> 00:03:44,110 Hundred and fifty five. 71 00:03:44,160 --> 00:03:44,620 OK. 72 00:03:44,620 --> 00:03:49,230 So let's actually go back and say this content underline in that example and here as you can see I need 73 00:03:49,230 --> 00:03:53,140 to click on this clear cache here and it's actually the doubleclick on the takes. 74 00:03:53,190 --> 00:03:55,860 And actually put a call in here. 75 00:03:55,940 --> 00:04:01,560 And let's actually go back and say this main activity the job of right here and now I want to actually 76 00:04:01,560 --> 00:04:06,510 show you the calculations that are actually being performed behind the screen. 77 00:04:06,510 --> 00:04:11,550 So inside of this for loop I could actually write this statement in an other way. 78 00:04:11,550 --> 00:04:16,800 So let's actually comment out this line of code here and now I can I could just type in total value 79 00:04:18,240 --> 00:04:22,590 plus assignment operator integer array sub index. 80 00:04:22,590 --> 00:04:25,500 So now let's actually run our project and see what happens. 81 00:04:25,500 --> 00:04:31,160 So again as you can see here the total value of the array is three hundred and fifty five. 82 00:04:31,200 --> 00:04:37,560 So this is our value and there is no difference between writing your code like this or this. 83 00:04:37,560 --> 00:04:38,120 OK. 84 00:04:38,220 --> 00:04:41,860 Are these two statements actually produce the same the same value. 85 00:04:41,910 --> 00:04:46,380 But I think writing your quotes in this way is actually more professional. 86 00:04:46,410 --> 00:04:46,920 OK. 87 00:04:46,980 --> 00:04:54,290 So let's actually comment out this line of code here and now I want to actually output the calculations 88 00:04:54,300 --> 00:04:56,510 that are actually being performed behind the screen. 89 00:04:56,550 --> 00:04:59,070 And I want to actually show those calculations to the user. 90 00:04:59,070 --> 00:04:59,500 OK. 91 00:04:59,580 --> 00:05:02,050 So here inside of this for loop. 92 00:05:02,180 --> 00:05:09,170 First of all let's actually instantiate this all takes a string object that actually created inline 93 00:05:09,380 --> 00:05:10,170 20. 94 00:05:10,430 --> 00:05:14,360 So I just need to refer to the name of this object assignment operator. 95 00:05:14,600 --> 00:05:21,500 And then I just need to type in here thinks the calculations that get text got too strange. 96 00:05:21,500 --> 00:05:23,110 OK. 97 00:05:23,120 --> 00:05:29,930 And now I need to actually refer to the name of this to the calculations object to the calculations 98 00:05:30,020 --> 00:05:34,030 that set text and then say The Apprentice's. 99 00:05:34,070 --> 00:05:42,380 First of all I need to actually reverse the name of this all text string object all text plus total 100 00:05:42,380 --> 00:05:44,260 value. 101 00:05:45,340 --> 00:05:46,090 OK. 102 00:05:46,520 --> 00:05:52,530 I referred to the name of this total value variable as you can see here plus two double quotes. 103 00:05:52,640 --> 00:05:58,210 And here I need to actually put in the plus OPERATOR OK. 104 00:05:58,550 --> 00:06:04,790 So that the user can understand what's going on here and I need to actually again put a plus plus operator 105 00:06:04,820 --> 00:06:05,740 again. 106 00:06:06,200 --> 00:06:14,490 So integer array sup index OK plus operator. 107 00:06:15,290 --> 00:06:19,160 And here again I put in two double quotes and inside double quotes. 108 00:06:19,190 --> 00:06:24,740 I just need to put in an equal operator and here as you can see first about a word with the name of 109 00:06:24,740 --> 00:06:26,510 this or text object. 110 00:06:26,650 --> 00:06:32,480 And then I refer to the name of this total value variable plus as you can see this plus is inside the 111 00:06:32,480 --> 00:06:36,380 double code so that the user can see what's going on behind the screen. 112 00:06:36,380 --> 00:06:36,940 OK. 113 00:06:36,950 --> 00:06:42,130 Integer array sub index with this value is the value that is inside of this array. 114 00:06:42,170 --> 00:06:47,110 And that value is related to that specific index of that array. 115 00:06:47,270 --> 00:06:53,210 And then I put another plus operator and then I put two double quotes and instead of double quotes I 116 00:06:53,210 --> 00:06:55,510 put an equal operator here. 117 00:06:55,730 --> 00:06:56,520 OK. 118 00:06:56,930 --> 00:06:59,920 And again this actually puts a plus operator here. 119 00:07:00,230 --> 00:07:05,020 And now let's actually create a newline character so that you can see what's going on here. 120 00:07:05,180 --> 00:07:08,080 And now I want to actually put in an expression here. 121 00:07:08,150 --> 00:07:08,700 OK. 122 00:07:09,050 --> 00:07:14,660 So I just need to put in a pair of round brackets and insert a round brackets. 123 00:07:14,660 --> 00:07:17,000 I can just type in total value. 124 00:07:17,600 --> 00:07:18,250 OK. 125 00:07:18,360 --> 00:07:29,700 Plus assignments operator integer are a sub index integer array sub index so as you can see here this 126 00:07:29,880 --> 00:07:32,740 expression is the same expression that we actually put here. 127 00:07:32,820 --> 00:07:33,250 OK. 128 00:07:33,300 --> 00:07:38,940 Integer array total value plus equal plus assignment operator integer array index. 129 00:07:38,940 --> 00:07:44,460 So you can actually execute this expression this operation here. 130 00:07:44,700 --> 00:07:45,300 OK. 131 00:07:45,300 --> 00:07:47,960 And then it's going can actually assign that value to these. 132 00:07:48,340 --> 00:07:50,370 The calculations that set text here. 133 00:07:50,400 --> 00:07:50,940 OK. 134 00:07:51,120 --> 00:07:55,420 So we don't need to actually execute this line of code here. 135 00:07:55,470 --> 00:08:02,160 So we commented out this line of code here and then we actually put that expression here so that the 136 00:08:02,160 --> 00:08:04,030 user can see what's going on. 137 00:08:04,230 --> 00:08:04,780 OK. 138 00:08:04,890 --> 00:08:10,260 And he is saying that's why the do these set text Meffert that is actually related to these calculations 139 00:08:10,320 --> 00:08:10,720 object. 140 00:08:10,740 --> 00:08:11,190 OK. 141 00:08:11,250 --> 00:08:14,280 So now let's actually run our project and see what happens. 142 00:08:14,280 --> 00:08:20,000 So as you can see here this is our application is actually running on this emulator. 143 00:08:20,190 --> 00:08:21,510 And this is the value of this. 144 00:08:21,540 --> 00:08:22,800 Our total value of the array. 145 00:08:22,800 --> 00:08:24,520 Three hundred and fifty five. 146 00:08:24,750 --> 00:08:29,430 And these are the calculations that are actually being performed behind the screen. 147 00:08:29,430 --> 00:08:29,920 OK. 148 00:08:30,090 --> 00:08:33,460 So as you can see here we actually messed up things a little here. 149 00:08:33,870 --> 00:08:38,330 And in order to solve this problem let's actually go back and say this main activity that over here 150 00:08:38,400 --> 00:08:41,100 and here we need to actually putting a plus. 151 00:08:41,100 --> 00:08:42,920 OPERATOR OK. 152 00:08:43,410 --> 00:08:47,870 Two double quotes and instead of double quotes I just need to put in a new line character OK. 153 00:08:47,970 --> 00:08:52,990 So that's the importance of actually using a newline character in your application. 154 00:08:53,010 --> 00:08:53,570 OK. 155 00:08:53,850 --> 00:08:56,970 So let's actually go on our project and see what happens. 156 00:08:56,970 --> 00:09:01,600 So again as you can see here our application is actually running on this emulator. 157 00:09:01,860 --> 00:09:05,900 And this is the total value of the array free hundred and fifty five. 158 00:09:06,180 --> 00:09:10,260 And these are the calculations that are actually being performed behind the screen. 159 00:09:10,300 --> 00:09:13,840 OK so let me actually explain here what's going on.