1
00:00:00,090 --> 00:00:00,780
‫Welcome back.

2
00:00:00,810 --> 00:00:05,340
‫In this video, I would like to show you my solution to the ternary operator challenge.

3
00:00:05,340 --> 00:00:08,000
‫And of course, use could look differently.

4
00:00:08,010 --> 00:00:10,640
‫So I'd say let's just get started.

5
00:00:10,650 --> 00:00:17,640
‫So the first thing that we will need is a input temperature, then the temperature message as well as

6
00:00:17,640 --> 00:00:18,510
‫the input value.

7
00:00:18,510 --> 00:00:20,400
‫And I'm using string empty here.

8
00:00:20,400 --> 00:00:26,310
‫You could of course just let it be an empty string, but it really opens up other opportunities to work

9
00:00:26,310 --> 00:00:28,080
‫with the string when we do it like this.

10
00:00:28,260 --> 00:00:35,700
‫So what we first of all need to know is the temperature that the user enters and we get the input from

11
00:00:35,700 --> 00:00:39,420
‫the console by using the console that read line.

12
00:00:40,140 --> 00:00:49,470
‫And then we want to validate if the value that the user entered is in fact a valid integer or not.

13
00:00:49,470 --> 00:00:52,590
‫And here we use try parse and we've done that multiple times.

14
00:00:52,590 --> 00:00:54,480
‫So I'm just going to keep it simple here.

15
00:00:54,480 --> 00:00:57,750
‫So just use this boolean to know if it was valid or not.

16
00:00:57,750 --> 00:01:03,360
‫And based on that, we can then go ahead and do the actual paternity operator.

17
00:01:03,420 --> 00:01:11,070
‫So I'm going to use an if statement with an LS statement here to check for the valid integer, but for

18
00:01:11,100 --> 00:01:15,780
‫the actual temperature, I'm going to use a ternary operator.

19
00:01:16,200 --> 00:01:17,760
‫So let's look at this.

20
00:01:17,760 --> 00:01:21,720
‫So what I have here is this if statement if valid integer.

21
00:01:21,720 --> 00:01:27,780
‫So if the input that the user entered is in fact an integer, then this code plug will be executed.

22
00:01:27,780 --> 00:01:30,300
‫And what is going to happen here?

23
00:01:30,570 --> 00:01:33,740
‫And by the way, of course, it's message with one eight.

24
00:01:33,750 --> 00:01:42,300
‫So what I have here is I say input temperature less or equal 15 So this is my statement because here

25
00:01:42,300 --> 00:01:48,540
‫I'm using the ternary operator and you can see it's a multi level ternary operator which can become

26
00:01:48,540 --> 00:01:49,260
‫quite complex.

27
00:01:49,260 --> 00:01:51,570
‫So I'm going to go through it step by step.

28
00:01:51,570 --> 00:01:54,540
‫So this here is basically my condition.

29
00:01:54,540 --> 00:01:59,450
‫So I'm checking, checking is input temperature less or equal?

30
00:01:59,460 --> 00:02:01,590
‫15 Now I'm checking.

31
00:02:01,590 --> 00:02:05,580
‫If that is true then state it is too cold here.

32
00:02:05,880 --> 00:02:07,080
‫So this is.

33
00:02:08,580 --> 00:02:10,410
‫The true case.

34
00:02:11,030 --> 00:02:14,270
‫And then what happens in the false case?

35
00:02:16,410 --> 00:02:19,490
‫In the first case, what I have is another condition.

36
00:02:19,500 --> 00:02:21,090
‫So here I'm checking again.

37
00:02:21,480 --> 00:02:28,380
‫Is the input temperature greater equals 16 and less equal 28.

38
00:02:28,380 --> 00:02:31,470
‫So is it between 16 and to 28 degrees?

39
00:02:31,470 --> 00:02:33,660
‫And we're talking about degrees Celsius here.

40
00:02:34,110 --> 00:02:35,850
‫And then I have another check.

41
00:02:35,850 --> 00:02:39,960
‫So I'm saying if it is true, execute this here.

42
00:02:40,590 --> 00:02:43,500
‫So just say it's cold here.

43
00:02:43,650 --> 00:02:48,060
‫Otherwise the this year I'll run the next code.

44
00:02:48,060 --> 00:02:51,240
‫So in our case we have another check.

45
00:02:51,240 --> 00:02:53,760
‫So here, by the way, this is for the case.

46
00:02:53,760 --> 00:02:54,450
‫It's true.

47
00:02:54,990 --> 00:02:56,490
‫And this is for the case.

48
00:02:56,490 --> 00:02:57,720
‫It's false.

49
00:02:59,120 --> 00:03:02,600
‫And then we have this check in temperature crater 28.

50
00:03:02,840 --> 00:03:09,580
‫If that is the case, print, it is hot here and else an empty string.

51
00:03:09,590 --> 00:03:14,000
‫So because we have all of those other checks here already.

52
00:03:14,210 --> 00:03:21,080
‫So if it's less than 15 and if it's higher than 28 and we have all of the cases in between, then basically

53
00:03:21,080 --> 00:03:25,130
‫this case will never be happening or it will never actually happen.

54
00:03:25,130 --> 00:03:28,610
‫But we still need to maintain the structure.

55
00:03:29,120 --> 00:03:30,590
‫So this is the condition.

56
00:03:30,680 --> 00:03:33,710
‫Then we say it's a ternary operator.

57
00:03:34,010 --> 00:03:38,180
‫Then we say, This is what's going to happen if it's true and this is what's going to happen if it's

58
00:03:38,180 --> 00:03:38,390
‫false.

59
00:03:38,400 --> 00:03:40,460
‫So after the colon each time.

60
00:03:41,270 --> 00:03:41,930
‫So I can.

61
00:03:41,930 --> 00:03:42,620
‫Of course.

62
00:03:43,800 --> 00:03:45,660
‫Have the same structure here again.

63
00:03:45,660 --> 00:03:46,830
‫So I'm saying.

64
00:03:47,040 --> 00:03:47,850
‫True.

65
00:03:48,330 --> 00:03:49,530
‫And I'm saying.

66
00:03:50,770 --> 00:03:51,460
‫False.

67
00:03:52,890 --> 00:03:53,550
‫All right.

68
00:03:53,730 --> 00:03:59,670
‫So this is our pretty long ternary operator with multiple cases in there.

69
00:03:59,670 --> 00:04:02,480
‫But overall, that's how you can use it.

70
00:04:02,940 --> 00:04:08,160
‫So the general structure is always you have the condition.

71
00:04:10,090 --> 00:04:11,470
‫Condition.

72
00:04:12,310 --> 00:04:14,200
‫Then question mark.

73
00:04:15,090 --> 00:04:16,020
‫If true.

74
00:04:16,530 --> 00:04:18,840
‫Colon if false.

75
00:04:19,870 --> 00:04:21,540
‫So what if the condition is true?

76
00:04:21,550 --> 00:04:22,890
‫This will be executed.

77
00:04:22,900 --> 00:04:25,270
‫If the condition is false, this will be executed.

78
00:04:26,410 --> 00:04:26,920
‫Okay.

79
00:04:27,070 --> 00:04:33,580
‫So then in the case we just say not a valid temperature and now let's just run this code to see if it's

80
00:04:33,580 --> 00:04:37,150
‫actually going to work or if I had a typo there or something like that.

81
00:04:37,270 --> 00:04:40,140
‫So enter the current temperature.

82
00:04:40,150 --> 00:04:41,680
‫Let me see in my room.

83
00:04:41,680 --> 00:04:42,910
‫It's quite hot.

84
00:04:42,910 --> 00:04:48,220
‫So I'm just going to say it's 25 degrees and it says it's cold here.

85
00:04:48,610 --> 00:04:52,150
‫That's because that's what the statement is saying here.

86
00:04:52,150 --> 00:04:56,260
‫So this really depends on the feeling that you have.

87
00:04:56,260 --> 00:05:01,630
‫So if you are coming from a super hot country, then you would say 28 degrees is still considered cold.

88
00:05:01,630 --> 00:05:02,140
‫I don't know.

89
00:05:02,140 --> 00:05:07,570
‫But if you are from the north of Europe, for example, or from Canada, then you would say, well,

90
00:05:07,600 --> 00:05:11,080
‫28 degrees Celsius, man, this is the hottest summer ever.

91
00:05:11,290 --> 00:05:13,210
‫So it's always relative.

92
00:05:13,210 --> 00:05:15,610
‫So you can of course, play around with those values.

93
00:05:16,120 --> 00:05:19,660
‫Okay, so that's it for ternary operators.

94
00:05:19,660 --> 00:05:24,760
‫I hope you manage to get this done correctly and see you in the next video.