1 00:00:00,210 --> 00:00:07,560 Now if you want to actually create another variable for example in that age and then I put in an assignment 2 00:00:07,590 --> 00:00:12,850 operator here and then I can assign a value to my valuable for example 35. 3 00:00:12,870 --> 00:00:13,470 OK. 4 00:00:13,650 --> 00:00:17,360 And then at the end of my statement I need to put in a semi-colon. 5 00:00:17,460 --> 00:00:23,750 So now we want to output the value of this variable to the console to make sure that it works OK. 6 00:00:24,300 --> 00:00:30,090 And then inside Apprentice's I need to refer to the name of my variable and then at the end of my statement 7 00:00:30,420 --> 00:00:32,500 I need to put in a semi-colon OK. 8 00:00:32,850 --> 00:00:38,130 So now if I run my project as you can see this value is now output to the console. 9 00:00:38,190 --> 00:00:46,440 OK this value is the value of my age variable and in line 41 I decided to output the value of my age 10 00:00:46,440 --> 00:00:47,530 variable to the console. 11 00:00:47,520 --> 00:00:48,110 OK. 12 00:00:48,300 --> 00:00:56,370 So now you want to actually create another variable boolean and the name of my variable would be can 13 00:00:57,030 --> 00:00:59,820 play football. 14 00:01:00,580 --> 00:01:01,280 OK. 15 00:01:01,350 --> 00:01:04,440 And then I can assign a value to my variable here. 16 00:01:04,590 --> 00:01:07,660 For example false or true. 17 00:01:07,920 --> 00:01:08,530 OK. 18 00:01:08,790 --> 00:01:12,680 And then at the end of my statement I need to put in a semicolon OK. 19 00:01:12,930 --> 00:01:18,600 So now if you want to output the value of this variable to the console I just need to type in her system 20 00:01:18,600 --> 00:01:25,290 that out that print's land and then inside the prentices I need to refer to the name of my valuable 21 00:01:25,650 --> 00:01:28,140 Channa play football. 22 00:01:28,440 --> 00:01:32,100 And at the end of my statement I need to put in a semi-colon OK. 23 00:01:32,370 --> 00:01:38,490 So now if I run my project as you can see it outputs the value of these can play with Paul variable 24 00:01:38,490 --> 00:01:39,090 to the console. 25 00:01:39,120 --> 00:01:44,950 OK so now I want to actually use the all logical operator here for my expressions. 26 00:01:44,970 --> 00:01:45,510 OK. 27 00:01:45,720 --> 00:01:49,100 I want to actually assign another value to my boolean value. 28 00:01:49,140 --> 00:01:51,670 So I just need to refer to the name of my value. 29 00:01:51,700 --> 00:01:53,060 Well OK. 30 00:01:53,340 --> 00:01:56,530 And then you want to assign a value to my value of it. 31 00:01:56,580 --> 00:01:59,430 So here I want to actually combine expressions together. 32 00:01:59,430 --> 00:02:07,420 So the first expression is for example the age must be less than 50. 33 00:02:07,730 --> 00:02:08,600 OK. 34 00:02:09,060 --> 00:02:17,310 And then I use the OR operator press on shift key plus the slash key on your keyboard two times. 35 00:02:17,310 --> 00:02:21,570 So as you can see this is the or logical operator that we use in Java. 36 00:02:21,570 --> 00:02:22,420 OK. 37 00:02:22,980 --> 00:02:27,220 And now I want to actually create an other expression. 38 00:02:27,510 --> 00:02:34,710 So I just put in practices here and then inside the practices I tell the computer that the age must 39 00:02:34,710 --> 00:02:37,390 be greater than 20. 40 00:02:37,710 --> 00:02:38,250 OK. 41 00:02:38,370 --> 00:02:42,170 And then at the end of my statement I need to put in a semi-colon OK. 42 00:02:42,630 --> 00:02:47,940 So now if I want to output the value of this variable to the console Let's see what happens. 43 00:02:48,040 --> 00:02:55,060 System that out that print and and an inside Apprentice's. 44 00:02:55,200 --> 00:03:00,730 I just need to refer to the name of my variable can play football. 45 00:03:00,780 --> 00:03:01,240 OK. 46 00:03:01,290 --> 00:03:04,670 And then at the end of my statement I need to put in a semicolon. 47 00:03:04,670 --> 00:03:05,250 OK. 48 00:03:05,550 --> 00:03:12,420 So if you run my project now as you can see it outputs this value to the console so they don't actually 49 00:03:12,420 --> 00:03:15,190 comment out these lines of code here. 50 00:03:16,260 --> 00:03:22,630 And if I run my project again as you can see it outputs the value of my hand play football variable 51 00:03:22,680 --> 00:03:23,430 to the concert. 52 00:03:23,430 --> 00:03:27,050 So as you can see here this expression here evaluates to TRUE. 53 00:03:27,060 --> 00:03:27,610 Why. 54 00:03:27,720 --> 00:03:31,730 Because the value of the H variable is less than 30. 55 00:03:32,040 --> 00:03:36,720 So as you can see here the value of the age variable is 45. 56 00:03:36,720 --> 00:03:37,380 OK. 57 00:03:37,380 --> 00:03:45,060 And here I am telling the computer that the value of the H variable must be less than 30. 58 00:03:45,210 --> 00:03:49,160 In order to evaluate the value of this expression true true. 59 00:03:49,230 --> 00:03:49,850 OK. 60 00:03:49,920 --> 00:03:53,200 And here I am using the OR operator OK. 61 00:03:53,370 --> 00:03:58,960 As you can see here this expression combines two comparison expressions. 62 00:03:59,820 --> 00:04:04,860 H must be less than 50 or H must be greater than 20. 63 00:04:04,860 --> 00:04:05,430 OK. 64 00:04:05,610 --> 00:04:06,200 OK. 65 00:04:06,240 --> 00:04:14,460 So if either of these expressions is true the boolean value true is assigned to the variable can play 66 00:04:14,460 --> 00:04:15,000 football. 67 00:04:15,090 --> 00:04:15,700 OK. 68 00:04:15,780 --> 00:04:24,870 Only if both of these expressions are false is the value of false assigned assigned to play football. 69 00:04:24,970 --> 00:04:25,430 You bet. 70 00:04:25,440 --> 00:04:34,800 OK so now let me actually show you the result as you can see here the value true is now out with it 71 00:04:35,040 --> 00:04:35,870 to the console. 72 00:04:35,970 --> 00:04:36,550 OK. 73 00:04:36,780 --> 00:04:39,480 So now let me actually explain what's going on here. 74 00:04:39,480 --> 00:04:39,960 OK. 75 00:04:40,030 --> 00:04:44,450 In Line 50 we created a value but AK ain't age. 76 00:04:44,640 --> 00:04:46,970 And to be assigned a value to a variable. 77 00:04:47,010 --> 00:04:47,520 OK. 78 00:04:47,580 --> 00:04:57,600 In line 52 we created another variable can play football with the boolean data type and we assigned 79 00:04:57,660 --> 00:04:59,680 the value true to our value but. 80 00:04:59,820 --> 00:05:05,860 And in line 35 I decided to change the value of the can play football valuable. 81 00:05:05,880 --> 00:05:06,320 OK. 82 00:05:06,330 --> 00:05:13,380 So as you can see here in line first if I put a combination of expressions as you can see here as a 83 00:05:13,380 --> 00:05:14,890 value for my variable. 84 00:05:14,940 --> 00:05:15,580 OK. 85 00:05:15,660 --> 00:05:20,870 So the first expression is 8 must be less than 30. 86 00:05:21,070 --> 00:05:24,450 OK the value of the H variable is 35. 87 00:05:24,500 --> 00:05:24,860 OK. 88 00:05:24,870 --> 00:05:25,820 As you can see here. 89 00:05:25,830 --> 00:05:31,920 So I am telling the computer that the value of the H variable must be less than 50. 90 00:05:31,980 --> 00:05:40,890 In order to evaluate the value of this expression to true and here I am using the OR operator or the 91 00:05:40,890 --> 00:05:44,580 value of the A2 variable must be greater than 20. 92 00:05:44,580 --> 00:05:44,980 OK. 93 00:05:45,000 --> 00:05:52,870 So as you can see here the value of the H variable is 55 35 is not less than 40. 94 00:05:52,980 --> 00:05:55,420 So this expression evaluates to false. 95 00:05:55,440 --> 00:05:59,220 Ok so now let me actually create a comment here. 96 00:05:59,220 --> 00:06:02,480 This expression here evaluates to false. 97 00:06:02,480 --> 00:06:03,250 Why. 98 00:06:03,270 --> 00:06:07,180 Because the value of the age variable is greater than 50. 99 00:06:07,320 --> 00:06:09,580 OK so false. 100 00:06:10,070 --> 00:06:10,730 OK. 101 00:06:11,070 --> 00:06:14,760 And here I am using the OR operator or. 102 00:06:15,590 --> 00:06:16,350 OK. 103 00:06:16,740 --> 00:06:20,050 And the value of the expression evaluates to TRUE. 104 00:06:20,220 --> 00:06:20,490 OK. 105 00:06:20,490 --> 00:06:25,130 Because the value of the age of the bell is greater than 20. 106 00:06:25,400 --> 00:06:26,170 OK. 107 00:06:26,190 --> 00:06:31,890 The value of the age variable is 45 and 35 is greater than 20. 108 00:06:32,010 --> 00:06:39,180 So the value of this expression evaluates to true and because I am using the old operator here if either 109 00:06:39,210 --> 00:06:41,120 of these expressions is true. 110 00:06:41,150 --> 00:06:41,590 OK. 111 00:06:41,730 --> 00:06:46,760 The boolean value truth is assigned to the variable can play football. 112 00:06:46,770 --> 00:06:47,350 OK. 113 00:06:47,490 --> 00:06:49,640 So this expression evaluates to TRUE. 114 00:06:49,650 --> 00:06:50,370 OK. 115 00:06:50,790 --> 00:06:58,550 As a result the entire expression evaluates to true and that's true value will be assigned to this can 116 00:06:58,560 --> 00:06:59,610 play football valuable. 117 00:06:59,610 --> 00:07:00,190 OK. 118 00:07:00,450 --> 00:07:09,510 So if I for example change this value to 40 and if I run my project now as you can see it's going to 119 00:07:09,510 --> 00:07:13,290 output the value of this variable to the council for us. 120 00:07:13,400 --> 00:07:14,150 OK. 121 00:07:14,530 --> 00:07:18,680 This fall this is the value of this can can play football valuable. 122 00:07:18,960 --> 00:07:26,670 So as you can see here this is this expression evaluates to false OK or this expression again evaluates 123 00:07:26,670 --> 00:07:28,440 to false as a result. 124 00:07:28,440 --> 00:07:33,470 The entire expression evaluates to false and that false value is assigned. 125 00:07:33,610 --> 00:07:35,850 Two can play football very well. 126 00:07:36,130 --> 00:07:38,950 And here as you can see this is that value OK. 127 00:07:39,150 --> 00:07:48,360 And here if I for example change this value to 42 as you can see here this expression now evaluates 128 00:07:48,360 --> 00:07:48,810 to TRUE. 129 00:07:48,810 --> 00:07:54,590 OK because the value of this age variable is now less than 42. 130 00:07:54,720 --> 00:07:55,380 OK. 131 00:07:55,640 --> 00:07:57,730 45 is less than 42. 132 00:07:57,870 --> 00:08:01,970 So this expression evaluates to true or as you can see here. 133 00:08:01,980 --> 00:08:05,830 Again I am using the OR operator the all logical operator here. 134 00:08:05,940 --> 00:08:09,310 Here as you can see this expression evaluates to false. 135 00:08:09,510 --> 00:08:16,130 So if I on my project as you can see because this expression evaluates to true that's enough. 136 00:08:16,140 --> 00:08:20,160 So now you can see here this expression evaluates to TRUE. 137 00:08:20,280 --> 00:08:24,310 OK all this expression evaluates to false. 138 00:08:24,330 --> 00:08:24,970 OK. 139 00:08:25,110 --> 00:08:29,610 So as you can see if I run on my project as you can see this value is now out with it to the console 140 00:08:30,120 --> 00:08:35,930 because when you are using an all logical operator between your expressions. 141 00:08:35,990 --> 00:08:36,570 OK. 142 00:08:36,660 --> 00:08:40,980 It is enough that only one of your expressions evaluate to true. 143 00:08:41,040 --> 00:08:41,580 OK. 144 00:08:41,580 --> 00:08:46,230 And as a result the entire expression evaluates to true. 145 00:08:46,230 --> 00:08:52,050 Now let me actually change this number two for example for the fourth. 146 00:08:52,200 --> 00:08:52,970 OK. 147 00:08:53,250 --> 00:09:00,370 Now as you can see this expression evaluates to true age must be greater than the first four. 148 00:09:00,540 --> 00:09:04,410 So as you can see here the value of my age variable is 55. 149 00:09:04,470 --> 00:09:11,580 And here I am telling the computer that the value of the age value of it must be greater than 44 in 150 00:09:11,580 --> 00:09:14,880 order to evaluate the value of this expression neutral. 151 00:09:14,930 --> 00:09:15,460 OK. 152 00:09:15,480 --> 00:09:18,080 And this expression again evaluates to true. 153 00:09:18,270 --> 00:09:23,590 And if I run my project now as you can see again it's going to output this value to the console. 154 00:09:23,610 --> 00:09:24,000 OK. 155 00:09:24,000 --> 00:09:28,180 But when you are using the and operator there is a different story. 156 00:09:28,200 --> 00:09:28,890 OK. 157 00:09:28,890 --> 00:09:34,850 All of your expressions must evaluate to true in order to evaluate the entire expression. 158 00:09:34,900 --> 00:09:35,410 True. 159 00:09:35,520 --> 00:09:39,350 OK that's enough for this or logical OPERATOR OK.