1 00:00:00,420 --> 00:00:08,790 So now for example in line 60 if you want to actually output the value of the first number are valuable 2 00:00:08,810 --> 00:00:17,010 to the console Let's see what happens system that out that print land and an insight Apprentice's. 3 00:00:17,070 --> 00:00:20,110 I just need to refer to the name of my variable. 4 00:00:20,120 --> 00:00:22,350 Ok let me actually put a text here. 5 00:00:22,470 --> 00:00:25,260 This is their value. 6 00:00:26,620 --> 00:00:32,830 Of my first number valuable after 7 00:00:36,010 --> 00:00:36,810 incrementing 8 00:00:40,450 --> 00:00:42,130 it's value 9 00:00:46,710 --> 00:00:50,860 so I just referred to the name of my valuable first number. 10 00:00:50,870 --> 00:00:51,420 OK. 11 00:00:51,570 --> 00:00:54,190 And then at the end of my statement I need to put in a semicolon. 12 00:00:54,190 --> 00:00:54,450 OK. 13 00:00:54,460 --> 00:01:02,820 Now if I run my project as you can see let me actually make this area wider in order to show you what's 14 00:01:02,820 --> 00:01:03,770 going on here. 15 00:01:04,140 --> 00:01:08,170 As you can see it's going to actually output this value to the consumer. 16 00:01:08,190 --> 00:01:08,720 OK. 17 00:01:08,820 --> 00:01:14,310 This is the value of my first number of valuable after incrementing its value. 18 00:01:14,460 --> 00:01:16,180 So this value is 51. 19 00:01:16,410 --> 00:01:17,020 OK. 20 00:01:17,250 --> 00:01:25,050 So as you can see here in line 58 I actually incremented the value of my first number of valuable buy 21 00:01:25,050 --> 00:01:25,500 one. 22 00:01:25,620 --> 00:01:26,260 OK. 23 00:01:26,550 --> 00:01:32,660 But because I use the postfix operator as you can see here I put the increment operator after the variable 24 00:01:32,700 --> 00:01:33,660 name OK. 25 00:01:33,810 --> 00:01:40,800 This is called the postfix OPERATOR OK because I put the increment operator after the variable name. 26 00:01:40,860 --> 00:01:45,940 OK because I put the postfix operator on my valuable name here. 27 00:01:46,070 --> 00:01:46,620 OK. 28 00:01:46,670 --> 00:01:51,590 It can actually assign only the value of this variable to my second variable. 29 00:01:51,720 --> 00:01:52,210 OK. 30 00:01:52,320 --> 00:01:56,310 And then it's going to increment its value by one. 31 00:01:56,430 --> 00:01:57,400 OK. 32 00:01:57,780 --> 00:02:04,420 So let me actually explain once again because I use the postfix operator on my variable name. 33 00:02:04,700 --> 00:02:05,440 OK. 34 00:02:05,790 --> 00:02:12,200 It's going to actually assign the value of this first number variable to my second number variable. 35 00:02:12,360 --> 00:02:15,770 And then it's going to add one value to my value. 36 00:02:15,780 --> 00:02:16,390 OK. 37 00:02:16,680 --> 00:02:24,050 So in this line of code here as you can see it's going to actually output the value of this first number 38 00:02:24,050 --> 00:02:27,050 the value of an after incrementing one value. 39 00:02:27,060 --> 00:02:33,010 To my first number value and in the console I divide the value of my first value but is 50. 40 00:02:33,020 --> 00:02:33,860 OK. 41 00:02:34,170 --> 00:02:36,810 The value of my second variable is 50. 42 00:02:36,810 --> 00:02:37,400 Why. 43 00:02:37,530 --> 00:02:41,130 Because of these are postfix operator here. 44 00:02:41,310 --> 00:02:42,130 OK. 45 00:02:42,570 --> 00:02:48,100 I use the postfix operator on my first number valuable because of this. 46 00:02:48,310 --> 00:02:54,070 First it's going to actually assign the value of my first number valuable to the second number variable. 47 00:02:54,090 --> 00:03:01,500 After that it's going to actually increment the value of this first number variable by 1. 48 00:03:01,680 --> 00:03:03,550 Ok because of this post fixed. 49 00:03:03,570 --> 00:03:04,800 OPERATOR OK. 50 00:03:04,980 --> 00:03:08,570 But there is a different story about prefix operators. 51 00:03:08,670 --> 00:03:15,590 OK so now let me actually show you in the console that this is the value of my first value. 52 00:03:15,610 --> 00:03:19,520 OK 52 the value of my first value bet is 50. 53 00:03:19,530 --> 00:03:20,280 OK. 54 00:03:20,280 --> 00:03:23,150 The value of my second variable is 50. 55 00:03:23,220 --> 00:03:30,870 This value here as you can see is the result of execution of this line of code here in line 60. 56 00:03:30,970 --> 00:03:40,290 OK here I decided to output the value of my first number valuable to the console after incrementing 57 00:03:40,350 --> 00:03:41,640 its value by 1. 58 00:03:41,730 --> 00:03:42,530 OK. 59 00:03:42,840 --> 00:03:43,990 So as you can see here. 60 00:03:44,160 --> 00:03:44,710 OK. 61 00:03:44,760 --> 00:03:46,550 I use the postfix operator here. 62 00:03:46,710 --> 00:03:47,720 OK. 63 00:03:48,090 --> 00:03:54,440 But in line 61 I assigned another value to my first number variable. 64 00:03:54,660 --> 00:03:59,190 I decided to use the prefix operator on my variable name. 65 00:03:59,240 --> 00:03:59,480 OK. 66 00:03:59,500 --> 00:04:07,500 As against the first number and in line sixty 62 I decided to output the value of my first number variable 67 00:04:07,800 --> 00:04:08,670 to the con.. 68 00:04:08,940 --> 00:04:12,840 So as you can see the value of my first number valuable is 52. 69 00:04:13,230 --> 00:04:15,530 So let me actually show you what's going on here. 70 00:04:15,630 --> 00:04:16,090 OK. 71 00:04:16,170 --> 00:04:20,780 Here in line 52 I declared my first number variable OK. 72 00:04:20,820 --> 00:04:29,140 I didn't assign any value to my value but as you can see here here in line 53 I declared my second number 73 00:04:29,150 --> 00:04:30,300 variable. 74 00:04:30,330 --> 00:04:39,430 And here in line 54 I declared my first number valuable but I didn't assign any value to my variable 75 00:04:39,450 --> 00:04:39,700 here. 76 00:04:39,720 --> 00:04:40,840 OK. 77 00:04:41,340 --> 00:04:51,180 Here in line 56 as you can see here I assigned a value to my first number variable which is number 50. 78 00:04:51,240 --> 00:04:52,150 OK. 79 00:04:52,830 --> 00:05:01,600 Here in line 57 I decided to output the value of this first number variable to the console. 80 00:05:02,130 --> 00:05:09,210 So as you can see here the value of my first number of value bet is this 50 this value here is the result 81 00:05:09,390 --> 00:05:11,700 of execution of this line of code here. 82 00:05:11,730 --> 00:05:12,180 OK. 83 00:05:12,180 --> 00:05:18,590 And here in this line of code I am telling the computer to output the value of my first number variable 84 00:05:18,750 --> 00:05:19,530 to the console. 85 00:05:19,770 --> 00:05:20,420 OK. 86 00:05:20,610 --> 00:05:31,290 As you can see here 50 and here in line fifty eight I decided to actually assign a value to my second 87 00:05:31,290 --> 00:05:32,350 number variable. 88 00:05:32,430 --> 00:05:33,100 OK. 89 00:05:33,690 --> 00:05:37,090 So I just refer to the name of my second number valuable. 90 00:05:37,140 --> 00:05:39,730 And then I put an assignment operator. 91 00:05:40,110 --> 00:05:45,850 And here I actually decided to assign a value to my second value. 92 00:05:46,230 --> 00:05:53,860 So I just wanted to actually refer to the name of my first number variable in order to read its value. 93 00:05:53,940 --> 00:05:58,240 Ok I use this postfix operator here on my valuable net here. 94 00:05:58,280 --> 00:05:58,720 OK. 95 00:05:58,770 --> 00:06:05,230 So as you can see in the console the value of my second number valuable as you can see here is 50. 96 00:06:05,400 --> 00:06:14,340 OK in line 60 here as you can see I decided to output the value of my first number variable to the console. 97 00:06:14,340 --> 00:06:16,280 This value is out to the console OK. 98 00:06:16,290 --> 00:06:21,190 This is the value of my first number variable after incrementing its value. 99 00:06:21,360 --> 00:06:23,520 As you can see its value is 51. 100 00:06:23,720 --> 00:06:24,420 OK. 101 00:06:24,750 --> 00:06:29,160 Because of this expression here first number plus plus. 102 00:06:29,160 --> 00:06:30,440 OK. 103 00:06:30,780 --> 00:06:38,380 And in line 61 I decided to assign a value to my first number value. 104 00:06:38,510 --> 00:06:38,840 OK. 105 00:06:38,840 --> 00:06:43,930 And here are used the prefix operator on my first number. 106 00:06:43,930 --> 00:06:45,920 Valuable as you can see here. 107 00:06:46,110 --> 00:06:46,980 OK. 108 00:06:47,850 --> 00:06:54,890 So in line 62 I decided to output the value of this first number variable to the console. 109 00:06:55,260 --> 00:07:00,740 So as you can see here the value of these first number valuable is 52. 110 00:07:01,070 --> 00:07:01,670 OK. 111 00:07:01,860 --> 00:07:02,550 Why. 112 00:07:02,580 --> 00:07:06,170 Because I used the prefix operator here. 113 00:07:06,240 --> 00:07:06,900 OK. 114 00:07:07,200 --> 00:07:11,660 When using prefix operator is an invaluable in an expression. 115 00:07:11,840 --> 00:07:19,090 The variable is incremented or decremented before its value is evaluated in that expression. 116 00:07:19,310 --> 00:07:19,850 OK. 117 00:07:19,950 --> 00:07:25,670 In this line of code here as you can see I use the prefix operator here. 118 00:07:26,040 --> 00:07:34,830 OK so the value of the first number of valuable is going to be incremented first and then it's going 119 00:07:34,830 --> 00:07:37,570 to be assigned to the first number value. 120 00:07:37,590 --> 00:07:47,190 OK because I used that plus plus operator before my variable name I use this prefix operator on my variable 121 00:07:47,190 --> 00:07:47,630 name. 122 00:07:47,790 --> 00:07:55,020 OK so let me actually tell you once again when using prefix operators on a variable in an expression 123 00:07:56,190 --> 00:08:02,890 the variable is incremented or decremented before its value is evaluated in that expression. 124 00:08:02,920 --> 00:08:10,170 OK so the value of this value as you can see first number variable is incremented before it is going 125 00:08:10,170 --> 00:08:12,770 to be assigned to my first number value. 126 00:08:12,960 --> 00:08:19,380 So as you can see in the console the value of my first value is 52. 127 00:08:19,380 --> 00:08:20,000 Why. 128 00:08:20,040 --> 00:08:23,930 Because I used this prefix operator on my variable name. 129 00:08:24,000 --> 00:08:29,580 And when you use prefix operators on your variable names the variable is going to be incremented or 130 00:08:29,580 --> 00:08:33,300 decremented before its value is evaluated in that expression. 131 00:08:33,310 --> 00:08:37,860 OK so because I use this prefix operator on my variable name. 132 00:08:37,910 --> 00:08:43,770 So first the value of my variable is going to be incremented after actually incrementing the value of 133 00:08:43,770 --> 00:08:45,420 my value here. 134 00:08:45,990 --> 00:08:51,990 And after that after I actually incrementing the value of my variable here is going to be assigned to 135 00:08:51,990 --> 00:08:53,410 the first number variable here. 136 00:08:53,450 --> 00:08:58,520 OK an inline sixty two I decided to output this value to the console. 137 00:08:58,770 --> 00:09:01,360 So now let me actually show you another example.