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Welcome back.
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So in this video, we will solve the problem of getting from point A to point B..
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OK, so what we will do is simply to initialize two variables, which are the distance between, let's
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say, 18 kilometers units.
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And also we'll have that the speed that the vehicle is going to be driving.
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So we have the speed.
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Also, let's say in terms of kilometers per hour, for example.
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OK, so if it's not kilometers per hour or maybe some other unit, of course, it may be also calculated
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using other units.
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I'm going to use the distance as the kilometers and the speed is kilometers per hour.
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And once we know the distance and the speed, we will we should calculate the time that it should take
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vehicle, our vehicle, our car to reach from city to city B so time in this case will be equal to what?
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So we know that first of all, let's say we know that distance distance equals to speed multiplied by
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time.
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Right.
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So if you drive at some speed and you multiply it by time, you will get the distance that you will
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pass.
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So just by modifying this equation a little bit, we will get that.
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Time equals distance divided by speed.
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So distance the distance divided by speed.
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So that's the formula that we are going to use to calculate the result of the calculate the actual time
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that it will take to reach from city to city B..
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And we are requested to initialize these very these variables.
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So for that, we will simply use distance and the distance is going to be something like, I don't know,
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300 kilometers, OK, kilometers.
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And also we will have the speed is something like, I don't know, 75 kilometers per hour.
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OK, so why meters per hour?
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That's the speed of the vehicle.
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And if we will use here time, OK, we can say that time equals to distance distance divided by speed.
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Right.
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We have here our formula time equals the distance divided by speed.
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We already explain it and the time itself is going to be in what units?
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It's going to be in our units hours, how many hours it took to reach from point A to point B..
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So if we will ride to the solution like this or half the time for driving from A to B, we'll take,
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I don't know, percentage these powers.
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Right.
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And here, of course, let's just minimize it a little bit.
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Instead of the percentage placeholder, we will use time, right?
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So awesome, so the time for driving from A to B will take a percentage these hours.
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So if we divide distance by speed, we will get three hundred divided by seventy five, which is, if
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I'm not mistaken, just four hours.
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OK, so let's build and run this program to make sure that it works exactly as we expected.
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Yeah.
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So the time for driving from A to B will take four hours if you drive it.
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Seventy five kilometers per hour and you do it and the distance is three hundred kilometers.
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But it's very important to notice here and basically for you to understand is that this answer is not
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entirely correct, since it's not necessary that the time will be exactly four hours on the clock.
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The time may also consist of minutes, right.
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The time may be also like four hours and 10 minutes, four hours and 20 minutes.
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He doesn't necessarily have to be some integer.
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Right, for example, represented just in terms of hours.
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So how should we also calculate the minutes that it took us to drive from point A to point B so that
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finally the result will be represented like he took us four hours and 10 minutes to reach from point
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A to point B?
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OK, so basically this calculation time equals distance divided by speed.
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It will give us just the the integer, just the the total hours, the full hours it took us to drive.
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But if, for example, we had, I don't know, speed instead of seventy five, even the speed was 80
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then what should be pointed to the screen now.
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Because we know that if we divide 300 by eight then it simply will be three hundred divided by eight.
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It will simply give us what will be three.
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Right.
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Three hours.
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Three total hours because time is of an integer type.
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So three hundred divided by eight will give us three hours.
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But what about the remaining three hours.
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Took us to complete two hundred and forty kilometers.
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What about the other 60 kilometers that were left.
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How should we calculate them.
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Basically we know that 60 kilometers it will take us less than an hour to complete.
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It will take us about 40 minutes.
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Something like this, 30 minutes, 40 minutes to complete.
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So how we should also calculate the timing hours.
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So first of all, what I suggest to do is to modify this variable and to call it instead of time, probably
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hours.
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OK, that's the total amount of hours they took to complete a given portion of the distance.
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And also what we should do is to create additional variable speeds flow.
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So float speed in minutes.
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Basically, that's the remaining speed and it will be equal to let's say, no, it's not.
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Let's use speed in minutes, not for the remaining part of the minutes, but rather just to calculate
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the speed.
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OK, just the calculator.
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That was my mistake, just to calculate the speed in minutes.
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So we have here the information that the speed per hours equals to this one, right.
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Kilometers per hour.
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And what I want us to do now is simply to represented this how many kilometers we will pass in a minute.
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So for that, we simply take the speed, the previous speed and divided by 60.
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And this will give us the speed.
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OK, the total amount of kilometers per minute.
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OK, so if we do gusts are 80 kilometers per hour and now it will take us eighty divided by 60 kilometers
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per minute.
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And I only remember what it is.
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It's kind of one point three three three kilometers per minute.
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So once you have this information, what we will have to do is to create additional variables.
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For example, minutes, remaining minutes, let's call it even this way, the remaining minutes, right.
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So remaining remaining remaining minutes.
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And once we have the remaining minutes, we know that, first of all, what we will take is the remainder
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of the distance divided right for speed, OK, which is simply the 60 kilometers we have previously.
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And how how many minutes, OK, how many minutes did it take us to complete?
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OK, the distance, that's the distance that left OK there.
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For example, if we had three hundred kilometers, so three hours, four hours, we passed two hundred
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and forty kilometers and all that's left is three hundred minus two hundred and forty, which is 60
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kilometers divided by the speed in minutes, the speed in minutes.
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And in this case, what we will get is the result of the remaining minute units.
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And finally you give everything was OK.
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So the time for driving the time, let's say, from A to B will take percentage hours and percentage
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DKK minutes and here will specify the hours and the remaining minutes.
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OK, guys, so I hope it's clear to you as to why we're using that.
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So let's let's just build and run it and see for ourselves that everything is working as expected.
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So the time from A to B will take three hours and 44 minutes.
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I think that something was with the with the casting here, but yeah, it should be.
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Yeah.
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So, yeah, it's very strange why we got here.
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Forty four minutes instead of forty five minutes.
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Something probably got missing with the grounding, so let's maybe try to find it out and.
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Oh yeah, it's probably here, it's rounded up to forty four and the reason is very simple because here
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we have distance and speed divided by speed which gives us an integer in this case divided by a floating
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point, and the result is a floating coin type.
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So basically we can use it here not to complicate everything for this exercise, like she is here to
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float remaining minutes and here he is, percentage F, OK, and in this percentage, two point two.
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So let's build in running just to make sure that everything works as expected.
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So the time for me to be will take three hours and forty five minutes, which is exactly the result
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we expected to receive.
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So it was not easy I guess, but ah I think you kind of understood what I meant and that the previous
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some, some of the basic explanations that some of them, the tutorials that I've seen that they don't
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take into account the minutes.
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And also we can also take here the seconds into account if we want to be really precise.
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But do not take just the few hours, take the portion of the hours as well as taking the portion of
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the minutes.
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And that's the way how you do it when you define a variable hours, taking the full hours out of the
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distance that it takes you to bef.
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So the full hour is three hours and then you take the remainder off of what is left for you and divide
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it by speed and minutes in order to get the time in minutes units.
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OK, so for that you calculated how what is your speed and kilometers per minute.
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Once you get the remaining minutes, you simply print the result to the screen.
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So as always, thank you so much for watching.
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Keep on practicing.
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You're improving.
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Also, we are recovering a lot of interesting things here.
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So until next time, I'll see you in the next videos.
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