1 00:00:01,270 --> 00:00:02,690 I hope you're excited 2 00:00:02,690 --> 00:00:04,680 for your next coding challenge 3 00:00:04,680 --> 00:00:06,673 so let's jump right in. 4 00:00:08,400 --> 00:00:11,400 And this time we have a different coding challenge. 5 00:00:11,400 --> 00:00:14,610 So, this time we have two gymnastics teams 6 00:00:14,610 --> 00:00:17,430 called the Dolphins and the Koalas. 7 00:00:17,430 --> 00:00:20,560 And they compete against each other three times, 8 00:00:20,560 --> 00:00:22,960 then the team with the highest ever score 9 00:00:22,960 --> 00:00:25,820 is the winner and wins a trophy. 10 00:00:25,820 --> 00:00:28,400 So here are your tasks. 11 00:00:28,400 --> 00:00:31,730 First, you should calculate the average score 12 00:00:31,730 --> 00:00:35,170 for each of the teams using the test data below. 13 00:00:35,170 --> 00:00:38,950 So, this test data right here, okay. 14 00:00:38,950 --> 00:00:41,930 Then compare the teams' average scores 15 00:00:41,930 --> 00:00:44,690 to determine the winner of the competition 16 00:00:44,690 --> 00:00:47,270 and also print it to the console. 17 00:00:47,270 --> 00:00:49,810 Now there might be a draw between the teams 18 00:00:49,810 --> 00:00:53,090 which means that they have the same average score. 19 00:00:53,090 --> 00:00:57,050 So, you need to test for that situation as well. 20 00:00:57,050 --> 00:00:58,860 So this is the basic challenge 21 00:00:58,860 --> 00:01:02,300 and I think this will be great to test the knowledge 22 00:01:02,300 --> 00:01:05,060 that you gained over the last couple of videos. 23 00:01:05,060 --> 00:01:07,360 Now if you want to take it to the next level 24 00:01:07,360 --> 00:01:09,360 and make it a little more difficult, 25 00:01:09,360 --> 00:01:13,460 you can try out the bonus one and bonus two. 26 00:01:13,460 --> 00:01:16,033 So, let's take a look at this. 27 00:01:17,070 --> 00:01:20,130 So, bonus one is to include the requirement 28 00:01:20,130 --> 00:01:22,960 for a minimum score of 100. 29 00:01:22,960 --> 00:01:25,870 So what this means is that the team only wins 30 00:01:25,870 --> 00:01:28,720 if it has a higher score than the other team. 31 00:01:28,720 --> 00:01:32,950 And, at the same time a score of at least 100 points. 32 00:01:32,950 --> 00:01:35,170 And to help you solve this one, 33 00:01:35,170 --> 00:01:38,180 I'm giving you the hint of using a logical operator 34 00:01:38,180 --> 00:01:41,770 to test for the minimum score of 100 points. 35 00:01:41,770 --> 00:01:45,370 Also, you will also probably need multiple else if blocks. 36 00:01:45,370 --> 00:01:46,650 All right. 37 00:01:46,650 --> 00:01:48,930 Now the second bonus here, 38 00:01:48,930 --> 00:01:52,340 is that the minimum score also applies to a draw. 39 00:01:52,340 --> 00:01:56,090 So a draw only happens when both teams have the same score 40 00:01:56,090 --> 00:02:00,300 and both have a score greater or equal 100 points. 41 00:02:00,300 --> 00:02:04,620 And otherwise no team at all wins the trophy, all right. 42 00:02:04,620 --> 00:02:08,700 And then here you actually have the test data for bonus one 43 00:02:08,700 --> 00:02:10,540 and for bonus two. 44 00:02:10,540 --> 00:02:12,730 And you can of course play around with these scores 45 00:02:12,730 --> 00:02:16,390 and change them to match all the different scenarios, okay. 46 00:02:16,390 --> 00:02:18,163 So these are not static, 47 00:02:19,189 --> 00:02:21,170 they're just some initial values that make sense 48 00:02:21,170 --> 00:02:23,653 but from there feel free to change them. 49 00:02:24,740 --> 00:02:26,730 So the first two are the easier ones 50 00:02:26,730 --> 00:02:29,810 and for these you use this test data. 51 00:02:29,810 --> 00:02:32,120 Then to make it a bit more difficult 52 00:02:32,120 --> 00:02:35,360 you can do bonus two and bonus one 53 00:02:35,360 --> 00:02:39,700 and for that you use these two test data sets, all right? 54 00:02:39,700 --> 00:02:43,580 Now if one of the bonuses turns out to be too hard for you 55 00:02:43,580 --> 00:02:45,120 then just don't do it. 56 00:02:45,120 --> 00:02:47,330 It's perfectly fine, okay. 57 00:02:47,330 --> 00:02:50,620 What matters is that you don't become frustrated. 58 00:02:50,620 --> 00:02:53,180 The goal here is really just to test the stuff 59 00:02:53,180 --> 00:02:54,510 that we did before 60 00:02:54,510 --> 00:02:57,980 and absolutely not to get you frustrated 61 00:02:57,980 --> 00:03:01,920 and thinking that coding might not be for you, okay. 62 00:03:01,920 --> 00:03:04,650 And again, don't focus on writing efficient 63 00:03:04,650 --> 00:03:07,410 or optimized code at this point, 64 00:03:07,410 --> 00:03:09,640 all we want here is to learn programming 65 00:03:09,640 --> 00:03:11,290 and to learn JavaScript. 66 00:03:11,290 --> 00:03:14,470 So, just make it work and, yeah... 67 00:03:14,470 --> 00:03:17,800 That's it for instructions about this challenge. 68 00:03:17,800 --> 00:03:21,083 So, pause the video now and I see you in a second. 69 00:03:24,400 --> 00:03:28,150 Now okay, hopefully you managed to complete 70 00:03:28,150 --> 00:03:30,900 at least point one and point two 71 00:03:30,900 --> 00:03:34,100 and so let's start by solving these two. 72 00:03:34,100 --> 00:03:39,030 So, number one is calculating the average of both teams. 73 00:03:39,030 --> 00:03:41,923 So let's create one variable for each. 74 00:03:43,060 --> 00:03:45,533 So, score Dolphins 75 00:03:45,533 --> 00:03:47,660 and so to calculate the average 76 00:03:47,660 --> 00:03:49,900 we simply add up all the three scores 77 00:03:49,900 --> 00:03:51,730 and then divide it by 3. 78 00:03:51,730 --> 00:03:53,940 So we already did something similar before 79 00:03:54,940 --> 00:03:59,023 so that's 96 plus 108 plus 89, 80 00:04:01,450 --> 00:04:03,570 and then divided by three. 81 00:04:03,570 --> 00:04:05,280 And we need these parentheses 82 00:04:05,280 --> 00:04:09,040 so that these plus operations are executed first. 83 00:04:09,040 --> 00:04:10,240 Because the grouping... 84 00:04:10,240 --> 00:04:13,853 So the parentheses have a higher precedence. 85 00:04:14,710 --> 00:04:19,710 Okay, score Koalas is 88 plus 91 plus 110 86 00:04:24,800 --> 00:04:26,510 And again divided by 3 87 00:04:28,130 --> 00:04:32,600 And now let's quickly log both to the console here. 88 00:04:32,600 --> 00:04:37,223 Score Dolphins and score Koalas. 89 00:04:41,350 --> 00:04:43,780 Okay, so they're pretty close 90 00:04:43,780 --> 00:04:47,950 but the Dolphins have a little bit higher of an average. 91 00:04:47,950 --> 00:04:51,700 And so that's what we're working on in point two 92 00:04:51,700 --> 00:04:55,780 where we're going to compare the average of both teams. 93 00:04:55,780 --> 00:05:00,780 So, we're gonna use an if statement or if else probably. 94 00:05:04,110 --> 00:05:08,553 So score dolphins, if it's greater than score Koalas 95 00:05:12,480 --> 00:05:14,263 then log to the console, 96 00:05:16,940 --> 00:05:20,880 Dolphins win the trophy. 97 00:05:20,880 --> 00:05:23,273 And we can get fancy here with some emoji. 98 00:05:25,790 --> 00:05:27,300 Let's see if we got one. 99 00:05:27,300 --> 00:05:29,500 Ah! That's the one I'm looking for. 100 00:05:29,500 --> 00:05:31,280 But of course once more, 101 00:05:31,280 --> 00:05:34,133 you don't need to worry about this part. 102 00:05:35,010 --> 00:05:37,033 Let's just copy this for the next one. 103 00:05:38,040 --> 00:05:39,500 So, else... 104 00:05:39,500 --> 00:05:42,120 And actually we are going to use an else if 105 00:05:42,120 --> 00:05:43,540 because of the draw. 106 00:05:43,540 --> 00:05:45,713 But let's talk about that one later. 107 00:05:47,130 --> 00:05:49,250 So, if the score of the Koalas 108 00:05:49,250 --> 00:05:52,730 is greater than score Dolphins 109 00:05:52,730 --> 00:05:55,360 then we're gonna print the opposite, 110 00:05:55,360 --> 00:05:58,393 so that Koalas win the trophy. 111 00:05:59,240 --> 00:06:04,240 And finally, else if score Dolphins is equal to score Koalas 112 00:06:07,975 --> 00:06:12,975 then we can simply say that no one wins the trophy, 113 00:06:16,320 --> 00:06:21,293 or actually both win the trophy. 114 00:06:24,240 --> 00:06:28,070 Okay, so let's test that and indeed, 115 00:06:28,070 --> 00:06:30,470 we get that Dolphins win the trophy 116 00:06:30,470 --> 00:06:34,850 and that because as we know, this value is greater. 117 00:06:34,850 --> 00:06:36,590 And so actually this first condition here 118 00:06:36,590 --> 00:06:38,660 turns out to be true right away 119 00:06:38,660 --> 00:06:41,543 and so this block of code here gets executed. 120 00:06:42,410 --> 00:06:44,110 Now let's just quickly increase 121 00:06:44,110 --> 00:06:46,490 the score of the Koalas here. 122 00:06:46,490 --> 00:06:51,490 Let's say 100, just to see if the second part also works 123 00:06:53,530 --> 00:06:56,283 And it did, now the Koalas win the trophy. 124 00:06:57,120 --> 00:06:58,820 Okay, but let's put it back here 125 00:06:59,770 --> 00:07:04,490 and here you could have actually done it in another way. 126 00:07:04,490 --> 00:07:07,310 So you could have done score Dolphins 127 00:07:07,310 --> 00:07:10,180 less than score Koalas. 128 00:07:10,180 --> 00:07:12,000 So basically you write the same as here 129 00:07:12,000 --> 00:07:13,860 but instead of the greater, 130 00:07:13,860 --> 00:07:15,920 you will have used the less than. 131 00:07:15,920 --> 00:07:20,550 So that's the exact same thing and both are equally valid. 132 00:07:20,550 --> 00:07:22,200 Then here in the last part 133 00:07:22,200 --> 00:07:25,620 actually, we wouldn't even have needed this part 134 00:07:25,620 --> 00:07:29,300 so that the score of Dolphins is equal to score of Koalas, 135 00:07:29,300 --> 00:07:32,320 because that's actually the only scenario that's left 136 00:07:32,320 --> 00:07:34,513 given these previous two conditions. 137 00:07:35,430 --> 00:07:38,300 So, basically if none of these here were true, 138 00:07:38,300 --> 00:07:39,940 really the only thing possible 139 00:07:39,940 --> 00:07:41,850 would be that they had the same score 140 00:07:41,850 --> 00:07:45,890 and so simple else block would have been enough here. 141 00:07:45,890 --> 00:07:48,590 But anyway, this works just fine too 142 00:07:48,590 --> 00:07:52,740 and so, again what matters is that you made it work 143 00:07:52,740 --> 00:07:54,990 even if you did some things differently. 144 00:07:54,990 --> 00:07:55,823 For example, 145 00:07:55,823 --> 00:07:57,260 you could have stored the conditions 146 00:07:57,260 --> 00:07:59,570 in separate boolean variables 147 00:07:59,570 --> 00:08:02,145 or you could have structured the if else statement 148 00:08:02,145 --> 00:08:03,980 in some different way. 149 00:08:03,980 --> 00:08:06,380 But if you got the same result that we just saw here, 150 00:08:06,380 --> 00:08:07,920 then congratulations. 151 00:08:07,920 --> 00:08:09,800 That's a great work. 152 00:08:09,800 --> 00:08:11,003 Well done, really. 153 00:08:11,910 --> 00:08:16,760 So, maybe you even made it to bonus number one and two 154 00:08:16,760 --> 00:08:20,370 and so let me solve them here now, as well. 155 00:08:20,370 --> 00:08:23,903 So, let's start by calculating the average. 156 00:08:29,570 --> 00:08:32,360 So, this is gonna be bonus one. 157 00:08:32,360 --> 00:08:36,333 And yeah, let's copy this one, too. 158 00:08:37,670 --> 00:08:38,960 Let's copy this one. 159 00:08:38,960 --> 00:08:40,770 Let's copy this one. 160 00:08:40,770 --> 00:08:43,040 So we should have done it all in one go 161 00:08:43,040 --> 00:08:46,203 so that we can now command out this first part. 162 00:08:48,400 --> 00:08:51,040 So, for test number one, 163 00:08:51,040 --> 00:08:53,450 this should be 97, 164 00:08:53,450 --> 00:08:57,193 then the second one should be 112 and 101 165 00:08:59,290 --> 00:09:03,833 And for the Koalas, we have 109, 95 and 123. 166 00:09:11,390 --> 00:09:13,220 Let's just quickly test. 167 00:09:13,220 --> 00:09:16,150 And so right now the Koalas win the trophy. 168 00:09:16,150 --> 00:09:18,320 So for now everything works the same 169 00:09:18,320 --> 00:09:22,130 but now we need to include this important condition here, 170 00:09:22,130 --> 00:09:24,201 which is that with this rule, 171 00:09:24,201 --> 00:09:26,930 a team only wins if it has a higher score 172 00:09:26,930 --> 00:09:29,350 than the other team, which we already have. 173 00:09:29,350 --> 00:09:33,033 And, at the same time a score of at least 100 points. 174 00:09:34,410 --> 00:09:35,550 Okay. 175 00:09:35,550 --> 00:09:36,553 Easy enough. 176 00:09:37,820 --> 00:09:40,693 So in this case, the Dolphins win. 177 00:09:41,620 --> 00:09:44,000 But now we also need to ensure 178 00:09:44,000 --> 00:09:47,300 that the Dolphins have a score higher or equal 100. 179 00:09:47,300 --> 00:09:48,793 So let's just say that. 180 00:09:50,800 --> 00:09:53,990 So Dolphins need to have a higher score than Koalas 181 00:09:53,990 --> 00:09:58,990 and score Dolphins needs to be greater or equal 100 182 00:10:01,000 --> 00:10:02,100 and that's it. 183 00:10:02,100 --> 00:10:05,030 That's all we need for this requirement. 184 00:10:05,030 --> 00:10:07,420 And then the same thing here. 185 00:10:07,420 --> 00:10:10,440 So this is the scenario where the Koalas win. 186 00:10:10,440 --> 00:10:12,020 So for the Koalas to win 187 00:10:12,020 --> 00:10:14,467 they need to have a higher score than the Dolphins 188 00:10:14,467 --> 00:10:16,459 and at the same time, 189 00:10:16,459 --> 00:10:20,420 they need to have at least 100 points. 190 00:10:20,420 --> 00:10:24,373 So just like before, greater or equal 100. 191 00:10:25,230 --> 00:10:27,775 And so once more, we used a logical operator here 192 00:10:27,775 --> 00:10:31,003 to model this situation essentially. 193 00:10:33,130 --> 00:10:36,570 Okay, and actually with this we implemented 194 00:10:37,719 --> 00:10:40,410 this bonus number one. 195 00:10:40,410 --> 00:10:43,340 So let's try that again 196 00:10:43,340 --> 00:10:45,277 and right now of course it still works 197 00:10:45,277 --> 00:10:50,000 because both have a score higher than 100 198 00:10:50,000 --> 00:10:51,535 but let's change that now here 199 00:10:51,535 --> 00:10:54,853 according to test data two, to 106. 200 00:10:55,840 --> 00:10:59,190 So, 106... 201 00:11:01,210 --> 00:11:03,930 and now they both win the trophy. 202 00:11:03,930 --> 00:11:08,190 So let's actually decrease all these points 203 00:11:08,190 --> 00:11:10,180 like by 20. 204 00:11:10,180 --> 00:11:14,563 So let's make it 81 and 86, 205 00:11:15,470 --> 00:11:18,560 so the average should still be the same now 206 00:11:18,560 --> 00:11:21,690 Yeah, but they're both below 100 now. 207 00:11:21,690 --> 00:11:25,032 And so this brings us to our bonus number two 208 00:11:25,032 --> 00:11:26,950 that says that the minimum score 209 00:11:26,950 --> 00:11:29,310 should also apply to a draw. 210 00:11:29,310 --> 00:11:33,670 So a draw only happens when both teams have the same score 211 00:11:33,670 --> 00:11:38,450 and both score greater or equal 100 points, okay. 212 00:11:38,450 --> 00:11:40,750 And otherwise, no team wins the trophy. 213 00:11:40,750 --> 00:11:41,950 So that's important too. 214 00:11:43,570 --> 00:11:46,270 So let's translate that. 215 00:11:46,270 --> 00:11:48,870 So to be a draw, the score needs to be the same 216 00:11:48,870 --> 00:11:50,270 which we already have. 217 00:11:50,270 --> 00:11:54,737 And the score of Dolphins 218 00:11:54,737 --> 00:11:57,950 needs to be greater or equal 100 219 00:11:58,870 --> 00:12:03,870 and the score of Koalas needs to be greater, equal 100, okay 220 00:12:08,950 --> 00:12:11,900 And else... 221 00:12:11,900 --> 00:12:15,403 Well, then we can say that no one wins the trophy. 222 00:12:23,016 --> 00:12:26,766 And let's just add some sad emoji here, okay. 223 00:12:31,530 --> 00:12:32,820 Let's try that 224 00:12:32,820 --> 00:12:37,400 and now we get that no one wins the trophy, okay. 225 00:12:37,400 --> 00:12:41,800 So that's because their scores are now below 100. 226 00:12:41,800 --> 00:12:45,870 And so, we actually enter this last case here. 227 00:12:45,870 --> 00:12:48,930 But if we go back to the averages that we had before 228 00:12:48,930 --> 00:12:53,930 so 106 and 101, let's see. 229 00:12:55,190 --> 00:12:57,050 Now both win the trophy 230 00:12:57,050 --> 00:12:59,600 because they have the same amount of points 231 00:12:59,600 --> 00:13:04,040 and they both have a number of points above 100. 232 00:13:04,040 --> 00:13:06,380 And so that's exactly what we have here. 233 00:13:06,380 --> 00:13:08,240 So, same points, 234 00:13:08,240 --> 00:13:12,140 Dolphins have over, or at least 100 points 235 00:13:12,140 --> 00:13:14,970 and Koalas have at least 100 points. 236 00:13:14,970 --> 00:13:17,483 And so in this case, both win the trophy. 237 00:13:18,520 --> 00:13:21,461 Finally, let's also test the scenario 238 00:13:21,461 --> 00:13:24,750 in which both have below 239 00:13:24,750 --> 00:13:28,000 but the Dolphins have a little bit more. 240 00:13:28,000 --> 00:13:32,220 Let's put this one here at 80, and so, 241 00:13:32,220 --> 00:13:36,000 now we see that the Dolphins have 96 points 242 00:13:36,000 --> 00:13:37,550 and the Koalas have 84 243 00:13:37,550 --> 00:13:39,570 but still no one wins the trophy. 244 00:13:39,570 --> 00:13:43,857 And that's because the Dolphins have more than the Koalas 245 00:13:43,857 --> 00:13:46,930 so this part of the requirement is true 246 00:13:46,930 --> 00:13:50,150 but they do not have over 100 247 00:13:50,150 --> 00:13:52,900 so this part here is false, okay 248 00:13:52,900 --> 00:13:56,520 and so true, this first part here is true 249 00:13:56,520 --> 00:13:57,970 and the second part is false. 250 00:13:57,970 --> 00:14:00,450 True and false gives false 251 00:14:00,450 --> 00:14:03,010 and so then all of these are skipped 252 00:14:03,010 --> 00:14:05,260 because they are also obviously false 253 00:14:06,170 --> 00:14:10,270 and so we go straight to this last block. 254 00:14:10,270 --> 00:14:11,870 And so no one wins the trophy 255 00:14:11,870 --> 00:14:14,435 which is exactly what we were expecting 256 00:14:14,435 --> 00:14:17,570 as a result here, okay. 257 00:14:17,570 --> 00:14:19,530 Now if you didn't manage to do this here, 258 00:14:19,530 --> 00:14:22,200 again, don't worry because I know that this is 259 00:14:22,200 --> 00:14:24,010 a little bit complicated already 260 00:14:24,010 --> 00:14:27,050 and so in case you managed to successfully 261 00:14:27,050 --> 00:14:31,430 complete this challenge, then a huge congratulations to you. 262 00:14:31,430 --> 00:14:32,830 Well done. 263 00:14:32,830 --> 00:14:34,440 But if for some reason, 264 00:14:34,440 --> 00:14:37,040 you were not able to complete the challenge 265 00:14:37,040 --> 00:14:39,950 then don't worry all too much about it. 266 00:14:39,950 --> 00:14:42,270 You can always go back to the lectures 267 00:14:42,270 --> 00:14:44,806 where we first learned about these topics 268 00:14:44,806 --> 00:14:47,860 and you can of course, after this video 269 00:14:47,860 --> 00:14:50,540 also review the code a little bit more carefully 270 00:14:50,540 --> 00:14:53,890 to make sure 100% that you understand 271 00:14:53,890 --> 00:14:58,530 especially this last example that we just worked on, okay. 272 00:14:58,530 --> 00:15:01,830 But anyway, great job in completing this challenge 273 00:15:01,830 --> 00:15:04,573 and now I see you in the next video.