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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,210 --> 00:00:04,710 Welcome to the second coding challenge. 2 2 00:00:04,710 --> 00:00:07,130 In this one you're gonna test your knowledge 3 3 00:00:07,130 --> 00:00:10,553 of the if/else statement that we just learned about. 4 4 00:00:12,220 --> 00:00:14,110 This coding challenge number two 5 5 00:00:14,110 --> 00:00:17,510 will basically improve the first challenge. 6 6 00:00:17,510 --> 00:00:20,420 We're still gonna be using DBMI example, 7 7 00:00:20,420 --> 00:00:24,430 but we are going to print a nice output to the console 8 8 00:00:24,430 --> 00:00:27,513 and this output is gonna tell us who has the higher BMI. 9 9 00:00:29,000 --> 00:00:30,810 The output message can be either 10 10 00:00:30,810 --> 00:00:33,770 Mark's BMI is higher than John's 11 11 00:00:33,770 --> 00:00:37,250 or John's BMI is higher than Mark's. 12 12 00:00:37,250 --> 00:00:38,420 That's the first part, 13 13 00:00:38,420 --> 00:00:41,700 and then as a second part use a template string 14 14 00:00:41,700 --> 00:00:45,653 to include the actual BMI values in the outputs. 15 15 00:00:47,040 --> 00:00:49,010 Okay, and as you can guess, 16 16 00:00:49,010 --> 00:00:51,940 you should probably use an if/else statement 17 17 00:00:51,940 --> 00:00:55,140 to complete this challenge, right? 18 18 00:00:55,140 --> 00:00:57,963 So, pause the video now and I'll see you in a second. 19 19 00:01:00,820 --> 00:01:02,000 All right. 20 20 00:01:02,000 --> 00:01:04,993 Again, I hope that you managed to do this. 21 21 00:01:07,610 --> 00:01:10,600 Let me show you how I did it. 22 22 00:01:10,600 --> 00:01:14,590 Let's start by getting this code from the other challenge, 23 23 00:01:14,590 --> 00:01:16,810 so coding challenge number one, 24 24 00:01:16,810 --> 00:01:21,513 because of course we don't have to repeat the same code. 25 25 00:01:24,930 --> 00:01:29,930 Here we have the mass and the height of both John and Mark, 26 26 00:01:30,307 --> 00:01:33,760 and we already have their BMIs calculated. 27 27 00:01:33,760 --> 00:01:38,760 We also have this condition here basically already, 28 28 00:01:38,820 --> 00:01:40,970 so this operation here already tells us 29 29 00:01:40,970 --> 00:01:44,503 whether Mark has a higher BMI or not, right? 30 30 00:01:45,403 --> 00:01:47,890 Let's get rid of this 31 31 00:01:48,990 --> 00:01:51,523 and let's write our if/else statement. 32 32 00:01:53,097 --> 00:01:56,014 If BMIMark is greater than BMIJohn, 33 33 00:02:00,208 --> 00:02:04,005 and here we could have just used this variable, 34 34 00:02:04,005 --> 00:02:09,005 so we could have written Mark higher BMI right here, 35 35 00:02:09,330 --> 00:02:11,280 but as I said in the previous lecture 36 36 00:02:11,280 --> 00:02:12,620 it's actually more common 37 37 00:02:12,620 --> 00:02:14,963 to write the condition directly in here. 38 38 00:02:15,890 --> 00:02:18,972 Let's get rid of this variable here, 39 39 00:02:18,972 --> 00:02:22,740 and then let's come here and get this string 40 40 00:02:24,595 --> 00:02:28,900 that we want to then log to the console. 41 41 00:02:28,900 --> 00:02:30,333 So console.log, 42 42 00:02:32,010 --> 00:02:34,970 and so this makes sense, right? 43 43 00:02:34,970 --> 00:02:38,020 If BMIMark is greater than BMIJohn, 44 44 00:02:38,020 --> 00:02:41,993 then we log to the console Mark's BMI is higher than John's, 45 45 00:02:43,430 --> 00:02:47,100 and if not, then we use the else statement. 46 46 00:02:47,100 --> 00:02:48,350 Let's copy this one here. 47 47 00:02:54,203 --> 00:02:58,120 In this case, John's BMI is higher than Mark's, 48 48 00:02:59,410 --> 00:03:01,020 and actually let's log both of them 49 49 00:03:01,020 --> 00:03:04,033 to the console here first, 50 50 00:03:05,105 --> 00:03:09,363 just so we see if our if/else statement 51 51 00:03:09,363 --> 00:03:10,970 is working as expected. 52 52 00:03:10,970 --> 00:03:12,543 So BMIMark and BMIJohn. 53 53 00:03:15,690 --> 00:03:19,203 As you see here, the VS code autocompletion is pretty smart. 54 54 00:03:21,050 --> 00:03:23,633 Give it a safe, let's try that, 55 55 00:03:25,670 --> 00:03:29,740 and we see John's BMI is higher than Mark's. 56 56 00:03:29,740 --> 00:03:32,020 So this one is Mark's, this one is John's, 57 57 00:03:32,020 --> 00:03:35,470 and indeed John's BMI is higher. 58 58 00:03:35,470 --> 00:03:40,470 Basically this condition here turned out to be false 59 59 00:03:40,492 --> 00:03:43,243 and the else block was executed. 60 60 00:03:44,330 --> 00:03:49,330 Let's try the same now with this first set of data here, 61 61 00:03:49,440 --> 00:03:52,920 and I'm commenting them out again using command slash 62 62 00:03:52,920 --> 00:03:55,283 or control slash on Windows. 63 63 00:03:56,290 --> 00:03:58,053 I need to comment out this one, 64 64 00:03:59,640 --> 00:04:01,760 okay, give it a safe, 65 65 00:04:01,760 --> 00:04:04,060 and now we should see the opposite. 66 66 00:04:04,060 --> 00:04:07,573 Indeed, now Mark's BMI is higher than John's. 67 67 00:04:09,332 --> 00:04:11,183 That is part one, 68 68 00:04:13,195 --> 00:04:18,195 and now part two is to actually write a template string, 69 69 00:04:19,240 --> 00:04:21,923 or this would be called a template literal. 70 70 00:04:22,880 --> 00:04:23,993 We just fix that. 71 71 00:04:25,130 --> 00:04:26,950 We should use a template literal 72 72 00:04:26,950 --> 00:04:29,690 to include the actual BMI values, 73 73 00:04:29,690 --> 00:04:32,023 so like this here between parenthesis. 74 74 00:04:33,200 --> 00:04:34,483 So, let's do that. 75 75 00:04:35,863 --> 00:04:38,887 We're going to transform this to backticks. 76 76 00:04:44,040 --> 00:04:46,020 That's the first thing, 77 77 00:04:46,020 --> 00:04:50,280 and then let's see the template again. 78 78 00:04:50,280 --> 00:04:54,140 Okay, so after the BMI we include two parenthesis 79 79 00:04:54,140 --> 00:04:55,830 and then in the parenthesis 80 80 00:04:55,830 --> 00:04:57,573 is where we want the actual value. 81 81 00:04:58,409 --> 00:05:01,930 This is where we put essentially the placeholder. 82 82 00:05:01,930 --> 00:05:04,000 Here we will put BMIMark 83 83 00:05:12,393 --> 00:05:13,810 and here BMIJohn. 84 84 00:05:18,220 --> 00:05:21,163 Now let's just copy this to make it a bit faster. 85 85 00:05:24,390 --> 00:05:26,663 Mark, and down here, John. 86 86 00:05:33,220 --> 00:05:36,017 Okay, let's see. 87 87 00:05:37,758 --> 00:05:40,893 Yeah, that works just fine. 88 88 00:05:42,010 --> 00:05:45,060 Cool, so with this we solved the challenge, 89 89 00:05:45,060 --> 00:05:47,770 and again, if you did it in a slightly different way, 90 90 00:05:47,770 --> 00:05:49,000 don't worry at all. 91 91 00:05:49,000 --> 00:05:52,080 That's completely normal and it's actually a good thing. 92 92 00:05:52,080 --> 00:05:54,120 It means that you're basically finding 93 93 00:05:54,120 --> 00:05:58,500 your own style of coding, which is a really a good thing 94 94 00:05:58,500 --> 00:06:00,480 so don't worry about that. 95 95 00:06:00,480 --> 00:06:04,410 What matters is that you actually used an if/else statement. 96 96 00:06:04,410 --> 00:06:06,400 That was, of course, mandatory. 97 97 00:06:06,400 --> 00:06:10,170 Otherwise you couldn't have made this work at all. 98 98 00:06:10,170 --> 00:06:12,667 All right, so this was a lot of fun 99 99 00:06:12,667 --> 00:06:16,980 because we actually made our code do something now. 100 100 00:06:16,980 --> 00:06:19,523 I hope you can really feel that as well. 8509