1 00:00:00,140 --> 00:00:00,830 OK. 2 00:00:01,200 --> 00:00:08,400 So now that I am referring to the name of my invaluable in order to get to read it's value what J I 3 00:00:08,400 --> 00:00:13,530 am actually adding this value to the number of 40 here. 4 00:00:13,560 --> 00:00:14,410 OK. 5 00:00:14,670 --> 00:00:16,370 So the result would be 41. 6 00:00:16,380 --> 00:00:17,150 OK. 7 00:00:17,370 --> 00:00:22,060 I am assigning the value of this operation here to this rally event. 8 00:00:22,290 --> 00:00:23,250 OK. 9 00:00:23,750 --> 00:00:28,870 And in this slide I Outwood the value of this variable to the console. 10 00:00:29,210 --> 00:00:29,820 OK. 11 00:00:31,330 --> 00:00:34,570 So let's run our project now as you can see here. 12 00:00:34,960 --> 00:00:38,320 It outputs the value 1 to the console. 13 00:00:38,320 --> 00:00:39,540 This rally to the console. 14 00:00:39,610 --> 00:00:44,260 And here it outputs of this value to the console. 15 00:00:44,350 --> 00:00:46,580 OK which is the result of this operation. 16 00:00:47,020 --> 00:00:50,830 As you can see it outputs the value of this variable to the console. 17 00:00:51,020 --> 00:00:51,830 OK. 18 00:00:52,690 --> 00:01:02,150 So the next example that I want to actually show you is about negative numbers in Java. 19 00:01:02,220 --> 00:01:02,460 OK. 20 00:01:02,470 --> 00:01:09,980 You can create negative numbers in Java for example if you want to create an integer variable here. 21 00:01:10,100 --> 00:01:17,440 And so the data type of my variable is in it and then the name of my variable would be negative. 22 00:01:19,150 --> 00:01:25,840 Number and then I assigned the value minus 10 to my variable here. 23 00:01:25,940 --> 00:01:26,620 OK. 24 00:01:26,770 --> 00:01:34,940 And here I just I can easily output the value of this value to the console system got out that Prince 25 00:01:34,960 --> 00:01:37,870 land and that inside Apprentice's. 26 00:01:38,080 --> 00:01:41,490 I just need to refer to the name of my variable here. 27 00:01:41,560 --> 00:01:43,000 So negative. 28 00:01:43,240 --> 00:01:50,440 And here again I use the other complex feature of the eclipse and now it's going to show me some recommendations. 29 00:01:50,590 --> 00:01:53,280 And here I choose the name of my variable here. 30 00:01:53,300 --> 00:01:57,570 OK the name of the variable that I created in the line 21. 31 00:01:57,660 --> 00:01:58,700 OK. 32 00:01:59,120 --> 00:02:05,040 And I just need to put a semi-colon up at the end of my statement here. 33 00:02:05,200 --> 00:02:06,340 OK. 34 00:02:06,860 --> 00:02:07,960 And as you can see. 35 00:02:08,170 --> 00:02:14,920 So if I run my project now it outputs this value which is the value of this value to the console. 36 00:02:15,010 --> 00:02:16,570 OK minus 10. 37 00:02:17,020 --> 00:02:23,770 The next example that I want to show you here is about negative decimal numbers. 38 00:02:23,770 --> 00:02:24,330 OK. 39 00:02:24,580 --> 00:02:31,600 So first let me actually comment out this line of code here because I don't want to execute this line 40 00:02:31,600 --> 00:02:32,420 of code. 41 00:02:32,860 --> 00:02:38,190 And first I need to declare the data type of Y variable which is float. 42 00:02:38,240 --> 00:02:38,910 OK. 43 00:02:39,790 --> 00:02:43,670 And then I need to actually give my variable a name. 44 00:02:43,690 --> 00:02:54,450 For example negative negative the small number or J. 45 00:02:54,970 --> 00:03:01,680 And then I assign a negative the symbol number to my variable for example four point eight. 46 00:03:01,750 --> 00:03:02,410 OK. 47 00:03:02,650 --> 00:03:11,320 And then at the end of my Actually statement at the end of my variable declaration I need to put a semicolon. 48 00:03:11,500 --> 00:03:12,470 OK. 49 00:03:12,910 --> 00:03:16,310 So here as you can see it's now Scheunemann error. 50 00:03:16,420 --> 00:03:18,700 OK so let's see what's this letter. 51 00:03:18,790 --> 00:03:26,530 We need to hover our mouse pointer over the error area in order to see what's the error type mismatch 52 00:03:26,860 --> 00:03:30,570 cannot convert from double to float. 53 00:03:30,580 --> 00:03:38,610 So as I said earlier in this section all floating point lead rules are considered to be of the double 54 00:03:38,620 --> 00:03:41,180 valuable time instead of load. 55 00:03:41,280 --> 00:03:42,090 OK. 56 00:03:42,370 --> 00:03:48,610 To specify a literal of load add the letter S to the literal. 57 00:03:48,730 --> 00:03:49,290 OK. 58 00:03:49,510 --> 00:03:57,780 So in order to make this little float we need to add the letter F at the end of our leader on here. 59 00:03:57,820 --> 00:03:58,580 OK. 60 00:03:59,600 --> 00:04:02,670 So as you can see here now the error is gone. 61 00:04:02,720 --> 00:04:08,470 OK so now if you want to output the value of this variable to the console. 62 00:04:08,600 --> 00:04:12,490 I just need to type in here system with a capital S.. 63 00:04:12,500 --> 00:04:17,980 OK this is really important system that's out. 64 00:04:18,230 --> 00:04:26,080 Got princeling and the inside Apprentice's you just need to refer to the name of this variable negative 65 00:04:27,800 --> 00:04:28,460 number. 66 00:04:28,780 --> 00:04:32,650 So here I use the auto complete feature of the eclipse. 67 00:04:32,650 --> 00:04:33,530 OK. 68 00:04:34,150 --> 00:04:37,310 And now it's going to show me some recommendations. 69 00:04:37,480 --> 00:04:44,620 So I choose my variable name here and at the end of your statements you need to put in a semicolon. 70 00:04:44,680 --> 00:04:54,100 OK so if I run my project now as you can see it outputs the value of this valuable to the customer which 71 00:04:54,100 --> 00:04:56,450 is number four point eight. 72 00:04:56,640 --> 00:04:57,390 OK. 73 00:04:57,940 --> 00:05:04,310 So the next example is about larger integer leaders. 74 00:05:04,350 --> 00:05:05,050 OK. 75 00:05:05,320 --> 00:05:14,140 So a larger integer literal can include an underscore character to make it more readable to humans. 76 00:05:14,140 --> 00:05:14,820 OK. 77 00:05:15,040 --> 00:05:22,960 The underscore character serves the same purpose as a comma in a large number make unique its value 78 00:05:23,230 --> 00:05:25,740 more readable to humans. 79 00:05:25,950 --> 00:05:26,520 OK. 80 00:05:26,770 --> 00:05:32,120 So let's so let me give you an example about this concept. 81 00:05:32,140 --> 00:05:32,740 OK. 82 00:05:33,010 --> 00:05:37,030 So the data type of our variable is large. 83 00:05:37,290 --> 00:05:37,890 OK. 84 00:05:38,050 --> 00:05:45,490 And the name of my variable is of very large number as you can see here. 85 00:05:46,490 --> 00:05:47,110 OK. 86 00:05:47,310 --> 00:05:51,640 And then I assign a very large number to this variable. 87 00:05:51,720 --> 00:05:56,030 For example this number OK. 88 00:05:56,310 --> 00:06:00,300 And at the end of my statement I just put a semicolon OK. 89 00:06:00,720 --> 00:06:05,750 And now as you can see it's a little hard to read this value here. 90 00:06:05,790 --> 00:06:06,420 OK. 91 00:06:06,690 --> 00:06:15,220 So we use the underscore character in order to make this value more apparent for humans. 92 00:06:15,240 --> 00:06:15,920 OK. 93 00:06:16,110 --> 00:06:24,330 So now if I use the others for character here as you can see and if I use another underscore character 94 00:06:24,330 --> 00:06:28,630 here as you can see this value is now more readable. 95 00:06:28,800 --> 00:06:29,400 OK. 96 00:06:29,580 --> 00:06:35,190 And the Java compiler ignores these activists. 97 00:06:35,230 --> 00:06:43,840 OK so you can use underscore characters in order to make your numbers more readable to humans. 98 00:06:43,920 --> 00:06:50,550 OK so now I want to actually output the value of this variable to the console. 99 00:06:50,670 --> 00:06:59,510 So here we just need to add typing system that out that princeling and then inside the apprentice's 100 00:06:59,930 --> 00:07:02,250 just referred to the name of the variable. 101 00:07:02,270 --> 00:07:03,480 OK. 102 00:07:04,130 --> 00:07:09,410 And that at the end of your statement you just need to put in a semi-colon. 103 00:07:09,650 --> 00:07:19,430 OK so the next example is about Boolean literals OK the boolean literal is true and false are the only 104 00:07:19,430 --> 00:07:26,190 two values you can use when assigning a value to a boolean value type. 105 00:07:26,370 --> 00:07:29,210 OK so now let me give you an example. 106 00:07:29,210 --> 00:07:29,720 OK. 107 00:07:29,990 --> 00:07:34,070 So the data type of our variable is boolean. 108 00:07:34,520 --> 00:07:42,140 As you can see here and the name of my variable is programming is fun. 109 00:07:42,140 --> 00:07:46,790 Programming is fun. 110 00:07:47,000 --> 00:07:47,680 OK. 111 00:07:47,990 --> 00:07:50,760 And then I assign a value to my variable. 112 00:07:50,810 --> 00:07:51,850 For example true. 113 00:07:52,000 --> 00:07:52,860 OK. 114 00:07:53,330 --> 00:07:59,080 True and False are the only values you can assign to a boolean value of. 115 00:07:59,090 --> 00:08:03,050 OK so now I want to output the value of this variable. 116 00:08:03,050 --> 00:08:10,590 The console system that out that princeling and the inside apprentices just refer to the name of the 117 00:08:10,590 --> 00:08:11,270 variable. 118 00:08:11,370 --> 00:08:15,350 So here I use the two complex feature of the eclipse. 119 00:08:15,690 --> 00:08:20,440 And then at the end of my statement I put a semi-colon. 120 00:08:20,640 --> 00:08:21,380 OK. 121 00:08:21,610 --> 00:08:25,570 And now let me comment out this line of code here. 122 00:08:25,950 --> 00:08:33,320 And if I run my project now as you can see it outputs the value of is valuable to the console. 123 00:08:33,390 --> 00:08:36,920 AJ So this is the literal truth. 124 00:08:37,040 --> 00:08:37,480 OK. 125 00:08:42,550 --> 00:08:53,150 So the next example is about character leader roles are expressed by a single character surrounded by 126 00:08:53,150 --> 00:08:55,190 single quotation marks. 127 00:08:55,190 --> 00:08:55,630 OK. 128 00:08:55,790 --> 00:08:59,200 So now let me give you some real examples. 129 00:08:59,360 --> 00:09:00,050 OK. 130 00:09:00,230 --> 00:09:07,440 So the data type are valuable is cards but yet you can hardly chart or charged. 131 00:09:07,640 --> 00:09:08,340 OK. 132 00:09:08,660 --> 00:09:12,750 And then the name of are valuable for example is a. 133 00:09:12,850 --> 00:09:13,460 OK. 134 00:09:13,730 --> 00:09:17,360 And then I assign the letter A to my body. 135 00:09:17,750 --> 00:09:27,400 So I just putting two single quotations here and then I assign the letter A to my value. 136 00:09:27,680 --> 00:09:32,530 And at the end of your statement you need to put a semicolon. 137 00:09:32,890 --> 00:09:33,420 OK. 138 00:09:33,710 --> 00:09:41,170 So now another example is car for example hash OK. 139 00:09:41,520 --> 00:09:45,330 And then I assign the hash symbol to my value. 140 00:09:45,490 --> 00:09:46,240 OK. 141 00:09:46,620 --> 00:09:54,250 Or I can actually create another variable and the name of my variable is 3. 142 00:09:55,250 --> 00:09:59,650 And then I can assign the value three to my value. 143 00:09:59,740 --> 00:10:00,090 OK.