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These are the user uploaded subtitles that are being translated: 1 00:00:00,330 --> 00:00:04,860 So you should see a day 2.3, Your Life in Weeks 2 00:00:05,160 --> 00:00:08,100 and this is the challenge that we're going to complete in this lesson. 3 00:00:09,390 --> 00:00:14,250 The idea is that there's a really great article by Tim Urban of wait 4 00:00:14,250 --> 00:00:17,910 but why on visualizing your life in weeks. 5 00:00:18,090 --> 00:00:21,720 And I was reading this recently and it really made an impact on me, 6 00:00:22,260 --> 00:00:27,260 especially when you see that a whole life from age zero to 90 can be mapped out 7 00:00:30,300 --> 00:00:35,300 like this in weeks where every week is represented by little check box. 8 00:00:36,030 --> 00:00:38,910 And you can see each of these boxes, right? 9 00:00:38,910 --> 00:00:41,970 This is like how many weeks you have in your whole life. 10 00:00:42,660 --> 00:00:44,340 And it's not as small as I thought it would be. 11 00:00:44,340 --> 00:00:47,970 I thought each of these boxes would be like invisible because they're so tiny 12 00:00:47,970 --> 00:00:50,730 because I have so many weeks in my life. But it's actually not true. 13 00:00:50,850 --> 00:00:54,420 There's actually not that many. So in today's coding challenge, 14 00:00:54,480 --> 00:00:59,480 what I want you to do is to create a program using the mathematical operations 15 00:00:59,880 --> 00:01:03,750 that you've learned about as well as the f-strings that you learned about in the 16 00:01:03,750 --> 00:01:08,580 last lesson to tell us how many days, weeks, and months we actually have left 17 00:01:08,910 --> 00:01:12,390 if we were lucky enough to live until 90 years old. 18 00:01:13,140 --> 00:01:16,260 The code is going to ask you for your current age, 19 00:01:17,250 --> 00:01:18,600 let's say that I'm 12. 20 00:01:19,710 --> 00:01:24,510 And then it's going to calculate the number of days, 21 00:01:24,540 --> 00:01:27,000 weeks, and months you have left in your life 22 00:01:27,390 --> 00:01:29,670 if you lived until 90. 23 00:01:30,240 --> 00:01:32,550 And then it's going to print it out to you like so. 24 00:01:34,410 --> 00:01:38,790 And the important premise of this code challenge for all of the tests to pass is 25 00:01:38,790 --> 00:01:40,980 that there are 365 days in a year, 26 00:01:41,340 --> 00:01:46,170 52 weeks in a year and 12 months in a year. I know that because of leap year, 27 00:01:46,170 --> 00:01:49,740 it's actually a little bit more than that. But for this exercise sake, 28 00:01:49,800 --> 00:01:53,040 let's just call it for 365, 52 and 12. 29 00:01:54,150 --> 00:01:58,230 Pause the video and see if you can complete this challenge and then head back 30 00:01:58,230 --> 00:02:00,450 over here and we'll walk through the solution together. 31 00:02:04,980 --> 00:02:07,380 All right. How did that exercise go? I'm sorry 32 00:02:07,380 --> 00:02:10,290 it's a little bit dark making you think about how many days, weeks, 33 00:02:10,290 --> 00:02:14,280 and months you have left in life, but you can think about it as a motivation, 34 00:02:14,280 --> 00:02:17,040 right? If I only have 400 months left, 35 00:02:17,160 --> 00:02:19,830 I don't know if I want to spend one of those months just watching game of 36 00:02:19,830 --> 00:02:22,410 Thrones. Maybe I want to do something for other people. 37 00:02:22,410 --> 00:02:26,940 Maybe I want to create something. So how are we going to calculate this? 38 00:02:27,150 --> 00:02:31,140 Well, we've got a hold of the age from the input, 39 00:02:31,320 --> 00:02:35,940 but you might remember from previous lessons that the input always creates a 40 00:02:35,940 --> 00:02:38,880 string datatype. In order to do math, 41 00:02:38,940 --> 00:02:41,250 we do still have to do a type conversion. 42 00:02:41,700 --> 00:02:45,750 So we have to change our age into a number. So let's call it age_ 43 00:02:45,780 --> 00:02:49,470 as_int. Age is never going to be a float, right? 44 00:02:50,160 --> 00:02:54,360 Because not many people are going to tell you that they are 56.4 years old. 45 00:02:54,720 --> 00:02:57,330 So we're going to accept this as a whole number. 46 00:02:57,870 --> 00:03:00,760 So we'll convert our age into an int. 47 00:03:01,720 --> 00:03:06,580 Now the next stage is we have to do some calculations. We have to calculate, 48 00:03:06,670 --> 00:03:09,310 um, the number of years left, right? 49 00:03:09,310 --> 00:03:14,310 So let's call it years_remaining and that's going to be equal to 90, 50 00:03:15,460 --> 00:03:19,720 so we're presuming we're going to live to 90, minus age_ 51 00:03:19,810 --> 00:03:24,340 as_int. So now that we've got the number of years remaining, 52 00:03:24,370 --> 00:03:27,460 we can calculate the number of days, weeks, and months left. 53 00:03:27,490 --> 00:03:32,490 So days_remaining is going to be equal to years_remaining multiplied by 54 00:03:35,530 --> 00:03:37,090 55 00:03:37,120 --> 00:03:40,690 because there are 365 days in a year. 56 00:03:41,440 --> 00:03:44,080 And then we can do the same for weeks, 57 00:03:47,820 --> 00:03:49,170 and months. 58 00:03:52,380 --> 00:03:57,240 So now that I've got hold of the number of days remaining, weeks remaining and 59 00:03:57,240 --> 00:04:01,500 months remaining, then I'm ready to actually use it inside my string. 60 00:04:01,800 --> 00:04:03,120 But before we do that, 61 00:04:03,180 --> 00:04:07,770 it's always helpful to check your code as you go along to make sure that it 62 00:04:07,770 --> 00:04:09,630 works exactly as you expect it to. 63 00:04:10,080 --> 00:04:15,080 So let's go ahead and try to print what is the number of months remaining. 64 00:04:17,100 --> 00:04:19,110 So if we go ahead and run our code, 65 00:04:19,230 --> 00:04:22,440 and let's say that we're 80 years old, right? 66 00:04:22,800 --> 00:04:27,390 Which means that we'll have 10 years remaining and we will have 120 months 67 00:04:27,390 --> 00:04:30,240 remaining. So all of that looks pretty good to me. 68 00:04:30,750 --> 00:04:35,250 So the next thing we have to do is to somehow output the sentence where it says 69 00:04:35,250 --> 00:04:39,030 you have X days, Y weeks and Z months left. 70 00:04:39,180 --> 00:04:41,940 So let's copy that and paste that sentence in here. 71 00:04:42,480 --> 00:04:47,130 And then I'm going to turn it into a string by wrapping it inside a set of 72 00:04:47,160 --> 00:04:49,950 double quotes. Now that I've got a string, 73 00:04:50,160 --> 00:04:54,750 I can turn it into an f-string by putting the character F before the string. 74 00:04:55,320 --> 00:04:57,390 And instead of having X, Y, and Z, 75 00:04:57,570 --> 00:05:02,570 I can replace them with some curly braces inside of which I can put my variable 76 00:05:03,750 --> 00:05:07,080 names. So I'll change this to days_remaining, 77 00:05:08,190 --> 00:05:10,170 this to weeks_remaining, 78 00:05:10,890 --> 00:05:13,560 and this to months_remaining. 79 00:05:17,880 --> 00:05:20,790 And now that I've got my string, I have two options. 80 00:05:20,850 --> 00:05:24,510 I can either just wrap this inside a print statement and print it as it is. 81 00:05:24,840 --> 00:05:29,400 But what I think might actually make it easier to read is to save it inside a 82 00:05:29,400 --> 00:05:33,030 separate variable, called message. And then in the next line, 83 00:05:33,060 --> 00:05:36,720 I can simply print my message. It does exactly the same thing, 84 00:05:36,990 --> 00:05:39,000 but I think this is a little bit easier to read. 85 00:05:39,690 --> 00:05:43,350 So now let's go ahead and run our code and see if we get any errors. 86 00:05:44,970 --> 00:05:49,410 It's asking us for our current age, let's say we're 67 years old. Well, 87 00:05:49,410 --> 00:05:54,410 then we only have 8,395 days and 1,196 weeks and 276 months. 88 00:05:58,190 --> 00:06:00,770 So I hope you managed to get this code challenge right. 89 00:06:01,160 --> 00:06:04,490 And even though the challenge is a little bit dark, well, 90 00:06:04,490 --> 00:06:07,520 at least remember that when you become a really good programmer, 91 00:06:07,520 --> 00:06:11,810 you'll be able to cut down on a lot of the boring things and repetitive tasks in 92 00:06:11,810 --> 00:06:15,800 life. So at least you will be claiming back some of those days, weeks, 93 00:06:15,800 --> 00:06:16,633 and months. 94 00:06:16,850 --> 00:06:21,080 So I hope you had fun with me on this code challenge. In the next lesson 95 00:06:21,140 --> 00:06:24,530 I've got a quiz for you. So head over there and to give it a go. 9422