Exercise 4

Modern JavaScript Using Control Structures
8 minutes
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Transcript

We've come to another exercise exercise for in this exercise you will be using some of the things you've learned about conditionals. Let's take a look at the assignment. exercise for once again consists of an HTML file, a JavaScript file, and then the PNG and the CSS file an HTML file, we've already linked the app dot j s for you. So you can simply focus on solving the problem. The problem you need to solve is use conditionals to sort three numbers. And we have given you three specific numbers six minus five and two, and sort them largest to smallest and then output the results to the console.

Now, just a couple of hints, you'll need To use nested if statements. In order to solve this problem, there will be outer if statements to determine which number is the largest. And then inside of that additional if statement to determine the next two numbers in the sequence. So go ahead and pause this movie. Once you think you have it figured out. Go ahead and start the movie again.

And we'll go through this together. All right, I hope you're able to solve that this is a bit trickier, much more much trickier assignment than we've had in the past. First, let's create the three variables. So I'm just going to call them num one, set that one equal to six, num to set that equal to minus five and then I'm three And set that equal to two and it with a semicolon. All right, now, let's think about how we would solve this. The first step seems to be find the largest number.

Once you have the largest number, then inside of that you can determine which of the last two numbers that are left is the largest and then put them in order based upon that. So let's do the if statements to find the largest largest number. So let's first check to see if num one is the largest number is num one greater than num two. And logical operator num one greater than num three. Okay. That will help us determine if num one is the greatest number.

Num one may not be the greatest number. So now we'll do an else. Yeah, let's check number two num two is greater than num one. And number two is greater than num three. Finally, it's possible that num three could be the largest number. So else if num three is greater than number one and num three is greater than num two.

All right, that will help us determine which number is the largest. Now inside of each one of these once we've determined that that particular number is as large as we need to do another if statement to determine which is the largest of the tune of the two remaining numbers. So that of course will be an if statement as well. So In this statement, number one is the largest number. So now let's determine if num two is larger than num, three. Whoops.

Else. If it's not, if that results in a faults, then we know that num three is larger than m two. So that gives us the condition we need to be able to put them in order. Now we can simply log it out and just log them in order. So number one will be the largest. And normally, we would concatenate them together something like this.

And then m two would be the next largest. And then oops another space and then Three. Okay, I said Normally, we would concatenate them like that, and that will work fine. Now we'll output the three numbers in the correct order, if this is the correct result. However, there's another way to use console dot log that makes it a little faster to enter all three numbers, we could simply do it like this. Now, in this case, num, one is the largest.

And then num, three. And then we just put a comma between the numbers and console dot log will output those three numbers with a space between them. It's building as part, a part of that method. It's associated with the console. All right, so that's one solution. That's the solution.

We determine if num one is the greatest. Let's just copy this. Let's come down here and What if num two is the greatest let's go ahead and paste that. So if num two is the greatest, then we'd want to check to see if num one is greater than num three. In that case would go numb to num one a num three. Otherwise if num three is greater, we would go numb to num three and num one.

Okay, that'll take care of that scenario. Paste in one more time and we'll modify this if num three is the greatest number. Then we want to check to see if num two is greater than num one. And m three will come first. Then num two. That num one down here num three will come first.

Then num one and then m two. So that should take care of each situation. Let's go ahead and save that and let's Try it with these three numbers, I'm going to copy the file path. Once again, put it into my browser, open the console. And six is larger than two is larger than negative five. So that seemed to work.

Jump back to sublime, let's just do some different numbers. Let's do a negative six, negative two. So all negative numbers and see what we get back. Refresh, display the console. Negative two is larger than negative five is larger than negative six. So it seems to be working.

If you're able to solve the same problem, great job. You may have done things slightly differently. But if you're still able to solve it, you should feel good that you accomplish the exercise. Great. Let's continue with the next movie.

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