1 00:00:00,420 --> 00:00:04,750 So first year plus four is 44 OK. 2 00:00:05,600 --> 00:00:13,480 And in line 47 I decided to actually output the value of this second variable to the concert. 3 00:00:13,560 --> 00:00:14,540 As you can see here. 4 00:00:14,640 --> 00:00:15,180 OK. 5 00:00:15,300 --> 00:00:17,600 This is the value of the second value. 6 00:00:17,610 --> 00:00:18,080 OK. 7 00:00:18,120 --> 00:00:26,810 So in light eight as you can see I decided to add value to my first variable. 8 00:00:27,000 --> 00:00:32,250 So this is how I actually assigned a value to my first variable. 9 00:00:32,610 --> 00:00:41,400 I decided to actually subtract 10 values from the value of my first variable and then I actually assigned 10 00:00:41,790 --> 00:00:45,410 the result of this operation here to my first variable. 11 00:00:45,420 --> 00:00:46,890 OK. 12 00:00:47,130 --> 00:00:52,990 So as you can see here the value of the first variable is fretty for now. 13 00:00:53,010 --> 00:00:53,350 OK. 14 00:00:53,370 --> 00:00:59,190 Because of this because of this expression here the value of the first of is 44. 15 00:00:59,330 --> 00:00:59,970 Okay. 16 00:01:00,330 --> 00:01:06,700 And in this line of code I want to subtract 10 values from the value of my first variable. 17 00:01:06,810 --> 00:01:07,370 OK. 18 00:01:07,580 --> 00:01:14,920 In line forty eight or you want to subtract 10 values from the value of my first variable. 19 00:01:15,140 --> 00:01:22,260 Ok so 54 minus 10 is 24. 20 00:01:22,420 --> 00:01:23,120 OK. 21 00:01:23,520 --> 00:01:31,240 And in line 49 I decided to out food the value of my first valuable to the console. 22 00:01:31,500 --> 00:01:37,090 So as you can see here in the console this is the value of my first value 24. 23 00:01:37,230 --> 00:01:37,790 OK. 24 00:01:38,010 --> 00:01:43,600 So be sure to practice this skill that I actually teach you in these lessons. 25 00:01:43,620 --> 00:01:44,270 OK. 26 00:01:44,430 --> 00:01:50,610 So now I want to show you some other examples about actually assigning values to your valuables. 27 00:01:50,610 --> 00:01:55,800 So first let me actually comment out these lines of code here because I don't because I don't want to 28 00:01:55,800 --> 00:01:56,730 execute them. 29 00:01:56,880 --> 00:01:57,560 OK. 30 00:01:58,200 --> 00:02:00,840 So I just create a multi-line comment. 31 00:02:00,840 --> 00:02:03,250 Again I want to create free variables here. 32 00:02:03,270 --> 00:02:03,770 OK. 33 00:02:03,900 --> 00:02:11,350 So the data type of my first variable is int and the name of my first variable is for example First 34 00:02:11,350 --> 00:02:13,470 the number. 35 00:02:13,560 --> 00:02:14,020 OK. 36 00:02:14,040 --> 00:02:17,040 And then I don't assign any value to my variable here. 37 00:02:17,130 --> 00:02:17,980 OK. 38 00:02:18,540 --> 00:02:21,210 And I want to create another variable here. 39 00:02:21,210 --> 00:02:26,140 So the data type of my variable here is in the name of my variable. 40 00:02:26,160 --> 00:02:31,700 Is second number. 41 00:02:32,760 --> 00:02:36,240 And then at the end of my statement I need to put in a semi-colon. 42 00:02:36,300 --> 00:02:37,010 OK. 43 00:02:37,440 --> 00:02:43,920 Again I want to create another variable so the data type of my variable is in it and the name of my 44 00:02:43,920 --> 00:02:48,280 variable would be first numbers. 45 00:02:48,330 --> 00:02:48,950 OK. 46 00:02:50,310 --> 00:02:52,950 And I don't assign any value to my variable here. 47 00:02:52,950 --> 00:02:54,840 OK so now. 48 00:02:54,930 --> 00:02:59,160 So now you want to actually assign a value to my first number variable. 49 00:02:59,200 --> 00:02:59,800 OK. 50 00:02:59,970 --> 00:03:06,720 So I just need to refer to the name of my first number variable and then I can actually assign a value 51 00:03:06,720 --> 00:03:07,920 to my variable. 52 00:03:07,920 --> 00:03:10,220 For example number 50. 53 00:03:10,340 --> 00:03:10,800 OK. 54 00:03:10,860 --> 00:03:14,370 And then at the end of my statement I need to put in a semicolon OK. 55 00:03:14,670 --> 00:03:23,280 So now I want to actually output the value of my variable to the console system that's out that creates. 56 00:03:23,490 --> 00:03:29,760 And then inside Apprentice's I need to refer to the name of my valuable first number and at the end 57 00:03:29,760 --> 00:03:32,230 of my statement I need to put in a semicolon. 58 00:03:32,610 --> 00:03:37,960 So if I run my project now as you can see it's going to output this values to the consulate number 50. 59 00:03:38,080 --> 00:03:45,830 OK so now I want to actually assign a value to my search number variable. 60 00:03:45,840 --> 00:03:50,480 So again I need to refer to the name of my search engine number variable. 61 00:03:50,760 --> 00:03:57,560 Ok I use the autocomplete feature of the eclipse in order to help me write my code faster. 62 00:03:57,570 --> 00:03:58,180 OK. 63 00:03:58,440 --> 00:03:59,410 Second number. 64 00:03:59,640 --> 00:04:02,460 And then I assign a value to my valuable here. 65 00:04:02,460 --> 00:04:02,920 OK. 66 00:04:03,030 --> 00:04:09,610 So you want to actually assign the value of my first number variable to my second number value. 67 00:04:09,840 --> 00:04:13,810 So here I just need to refer to the name of my first number of variables. 68 00:04:13,920 --> 00:04:20,570 As you can see and here I need to put a semi-colon at the end of my statement and I want to actually 69 00:04:20,580 --> 00:04:27,930 output the value of this variable to the console system that out that prints land and the inside Apprentice's 70 00:04:27,960 --> 00:04:30,340 I need to refer to the name of my value. 71 00:04:30,350 --> 00:04:33,250 But the second number. 72 00:04:33,270 --> 00:04:34,230 OK. 73 00:04:35,550 --> 00:04:42,900 So now if I run my project as you can see it's going to actually again outputs this value to the console 74 00:04:42,900 --> 00:04:43,230 OK. 75 00:04:43,260 --> 00:04:45,860 This is the value of my second number. 76 00:04:45,990 --> 00:04:46,370 OK. 77 00:04:46,410 --> 00:04:53,220 So I assigned the value of the first number to my second number and in line 59 I actually decided to 78 00:04:53,220 --> 00:04:55,150 output this value to the consulate. 79 00:04:55,230 --> 00:05:02,620 So now let me actually put the increment operator at the end of my first number of valuable plus plus. 80 00:05:03,000 --> 00:05:04,190 OK. 81 00:05:04,530 --> 00:05:09,200 And now you want to actually assign a value to my first number variable. 82 00:05:09,210 --> 00:05:15,630 So I just need to refer to the name of my first number variable and then I can assign a value to my 83 00:05:15,630 --> 00:05:16,740 first number variable. 84 00:05:16,740 --> 00:05:22,850 So now you want to actually put the increment operator before the name of my variable. 85 00:05:23,010 --> 00:05:26,240 So plus plus first number. 86 00:05:26,250 --> 00:05:26,950 OK. 87 00:05:27,270 --> 00:05:30,360 And then at the end of my statement I need to put in a semicolon. 88 00:05:30,690 --> 00:05:37,880 So now I want to output the value of this variable to the console system that out that print line. 89 00:05:38,280 --> 00:05:43,620 And then inside Apprentice's I just need to refer to the name of my variable for number and at the end 90 00:05:43,620 --> 00:05:48,490 of my statement I need to put in a semi-colon in order to make the eclipse happy. 91 00:05:48,510 --> 00:05:50,460 And as you can see the error is now gone. 92 00:05:50,520 --> 00:05:51,100 OK. 93 00:05:51,300 --> 00:05:57,270 So this is very important that you always end your statements with the semi-colon OK. 94 00:05:57,720 --> 00:06:04,740 So now if I on my project it's going to show me some different results because of the difference between 95 00:06:05,000 --> 00:06:07,660 our prefix and postfix operations. 96 00:06:07,720 --> 00:06:11,570 OK so now let me actually run my project and see what happens. 97 00:06:11,580 --> 00:06:12,270 OK. 98 00:06:12,660 --> 00:06:17,450 So as you can see here it's going to output these free values to the console OK. 99 00:06:17,790 --> 00:06:23,090 So the first one is the result of execution of this line of code as you can see here. 100 00:06:23,340 --> 00:06:31,550 And the second value as you can see here this value is the result of execution of this line of code. 101 00:06:31,880 --> 00:06:37,870 And at the first value as you can see here is the result of execution of this line of code here. 102 00:06:37,890 --> 00:06:38,590 OK. 103 00:06:38,760 --> 00:06:43,530 So when you use postfix operators on a variable in an expression. 104 00:06:43,560 --> 00:06:49,150 So as you can see here are used these postfix operator on this first number variable here. 105 00:06:49,150 --> 00:06:49,620 OK. 106 00:06:49,650 --> 00:06:54,790 So when you use postfix operators on a variable in an expression. 107 00:06:54,840 --> 00:06:56,900 So as you can see here this is an expression. 108 00:06:56,910 --> 00:06:57,410 OK. 109 00:06:57,540 --> 00:07:00,980 This line of code is an expression because it conveys a value. 110 00:07:01,140 --> 00:07:01,690 OK. 111 00:07:01,800 --> 00:07:03,560 As I told you before. 112 00:07:03,690 --> 00:07:04,290 OK. 113 00:07:04,470 --> 00:07:12,720 When you use postfix operators on a variable in an expression their variables value is evaluated in 114 00:07:12,720 --> 00:07:16,850 the expression before it is incremented or decremented. 115 00:07:17,190 --> 00:07:17,770 OK. 116 00:07:17,900 --> 00:07:23,300 Inlight fifty eight I decided to actually add a value to my value. 117 00:07:23,310 --> 00:07:30,780 But as you can see I actually referred to the name of my first number variable and at the end of my 118 00:07:31,290 --> 00:07:34,300 variable name I put an increment operator here. 119 00:07:34,320 --> 00:07:35,160 OK. 120 00:07:35,550 --> 00:07:38,550 As you can see here this is the postfix operator. 121 00:07:38,610 --> 00:07:41,020 I put the postfix operator here as you can see here. 122 00:07:41,040 --> 00:07:43,980 OK this is the increment operator OK. 123 00:07:44,550 --> 00:07:48,340 And then I assigned this value to the second number value. 124 00:07:49,450 --> 00:07:57,400 So when you use postfix operators on a value bet in an expression the variables value is evaluated in 125 00:07:57,400 --> 00:08:00,760 the expression before it is incremented or decremented. 126 00:08:00,820 --> 00:08:01,580 OK. 127 00:08:01,900 --> 00:08:08,520 So as you can see here this value here is the result of actually executing design of code here. 128 00:08:08,560 --> 00:08:09,250 OK. 129 00:08:09,670 --> 00:08:15,200 But this value is the same as the value of my first number. 130 00:08:15,610 --> 00:08:19,020 When I actually assigned a value to my first number OK. 131 00:08:19,090 --> 00:08:25,730 So here I actually put an increment operator here in order to add 1 value to this first number value. 132 00:08:25,740 --> 00:08:31,550 But but because I used the postfix operator on the first number are valuable here. 133 00:08:31,750 --> 00:08:39,350 OK this variable value is evaluated in the expression before it is incremented or decremented. 134 00:08:39,460 --> 00:08:45,460 So here because I use the postfix operator on my first number variable. 135 00:08:45,690 --> 00:08:46,520 OK. 136 00:08:47,050 --> 00:08:53,560 It's not going to actually increment the value of this variable and then assign this value to my second 137 00:08:53,560 --> 00:08:54,430 variable. 138 00:08:54,550 --> 00:09:00,580 It's going to actually assign the value of this first number variable to my second number variable. 139 00:09:00,610 --> 00:09:06,730 And then after that assignment it's going to actually increment the value of this first number variable 140 00:09:06,910 --> 00:09:07,450 by 1. 141 00:09:07,480 --> 00:09:11,970 OK because I use the postfix operator this happened. 142 00:09:12,160 --> 00:09:20,830 So let me actually explain once again because I used the because I used the postfix operator on my first 143 00:09:20,830 --> 00:09:22,390 number variable here. 144 00:09:22,690 --> 00:09:29,890 OK the value of this first number of valuable will be assigned to second number variable and then it's 145 00:09:29,890 --> 00:09:34,430 going to actually increment the value of this first number variable by 1. 146 00:09:34,480 --> 00:09:40,690 Ok so now as you can see it's going to actually assign the value of this first number variable which 147 00:09:40,690 --> 00:09:43,910 is 50 to my second number variable. 148 00:09:43,910 --> 00:09:49,340 And then it's going to actually increment that value by 1. 149 00:09:49,730 --> 00:09:50,280 OK.