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Awesome, we can display the next person on the previous person and of course, let's work on the random
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person functionality.
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I think I'm going to come up right away with a function.
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So we're going to go with CONSED.
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And of course, we'll mindless, random, random person.
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Now, that is going to be equal to, of course, my natural function.
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Now, I'm not going to pass anything inside of the function, but just to showcase how the math random
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works, we're going to go along and the math and then random and will right away invoke it.
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And now, of course, where I have my button, I'm just going to go with on click not is going to be
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equal to my random.
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So now of course I'm going to navigate a bigger screen and then in a console you'll notice that as you're
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clicking on random person, you get a random value and that value always will be between zero and one
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hour.
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It can be zero, but it will never be one.
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So it can be zero point nine nine nine nine nine nine nine nine nine nine nine nine, but it's never
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going to be one.
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So how we can use this random value to get the random person from the array?
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Well, there's multiple ways how you can do that.
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But one of the ones that I like the most is simply by multiplying the value with a length of the array.
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And then just make sure that number is always around it down, so we go here with LET and then I'll
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call this random number.
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Now I'm purposely using a lot and you'll see in a second why and that is going to be equal to a mouth
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random.
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So first, what I could do is multiply by the length of my array, which of course in my case is going
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to be four because I have four items.
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So then if we navigate here now and by the way, I didn't cancel my bad.
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So we go here with a random.
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No, here, and you'll notice that as I'm clicking now, I'm getting a random number between a zero
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and four.
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So the thing is, it is never going to be really four because again, I will never have one.
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So if I multiply zero point nine nine nine something by four, it's always going to be somewhere between
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three and then four, but it's never going to be four.
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And what I would want to do instead is just always round it down.
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So then the values will be between zero and three.
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So essentially they're just going to give me all the indexes that I have in a row since I have four
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items.
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I have indexes between zero and three zero one, two and three.
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This is exactly what I'm going to do.
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So I'm going to have a math.
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Math on the floor, and I'll pass in this value so I can multiply the random number by the length of
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my array and I always make sure that I round it down so that just going to give me this random index.
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So, again, if we now get here.
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If we keep on pressing notice how we're getting values between zero and three, not one issue that people
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have complained about is the fact notice, even though technically it is a random number, once you
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click, you get some repetition.
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And essentially what that means is that as you're clicking the button, technically, if the numbers
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are exactly the same, well, the person won't change over here.
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And in order to avoid that, what you could do is simply say, you know what, if the random number
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is equal to my current index, well, then just add one or, I don't know, subtract one, whatever
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you want to do.
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So here, I'll say if.
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And then random, no, not person, but around them and the number, if it is equal to an index, then
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either add one or subtract one.
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That's up to you.
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You say random number is equal to index plus one.
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And then, of course, I would want to set index, but make sure that you also go with it.
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Check number where if you're adding this plus one, you still might run into this problem where the
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value might be bigger than the index for the last item in the array.
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So let's go with that index.
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But instead of just passing random number, we also need to go check number and then only pass this
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random number.
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And that way what happens is that you'll successfully avoid that repetition where if I go with random
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numbers, how each and every time there's going to be a random person, hopefully you're able to complete
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the project.
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And I hope to see you in the next project.
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