Original subtitles

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Welcome to the second coding challenge. 2

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In this one you're gonna test your knowledge 3

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of the if/else statement that we just learned about. 4

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This coding challenge number two 5

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will basically improve the first challenge. 6

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We're still gonna be using DBMI example, 7

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but we are going to print a nice output to the console 8

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and this output is gonna tell us who has the higher BMI. 9

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The output message can be either 10

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Mark's BMI is higher than John's 11

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or John's BMI is higher than Mark's. 12

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That's the first part, 13

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and then as a second part use a template string 14

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to include the actual BMI values in the outputs. 15

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Okay, and as you can guess, 16

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you should probably use an if/else statement 17

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to complete this challenge, right? 18

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So, pause the video now and I'll see you in a second. 19

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All right. 20

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Again, I hope that you managed to do this. 21

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Let me show you how I did it. 22

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Let's start by getting this code from the other challenge, 23

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so coding challenge number one, 24

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because of course we don't have to repeat the same code. 25

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Here we have the mass and the height of both John and Mark, 26

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and we already have their BMIs calculated. 27

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We also have this condition here basically already, 28

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so this operation here already tells us 29

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whether Mark has a higher BMI or not, right? 30

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Let's get rid of this 31

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and let's write our if/else statement. 32

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If BMIMark is greater than BMIJohn, 33

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and here we could have just used this variable, 34

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so we could have written Mark higher BMI right here, 35

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but as I said in the previous lecture 36

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it's actually more common 37

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to write the condition directly in here. 38

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Let's get rid of this variable here, 39

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and then let's come here and get this string 40

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that we want to then log to the console. 41

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So console.log, 42

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and so this makes sense, right? 43

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If BMIMark is greater than BMIJohn, 44

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then we log to the console Mark's BMI is higher than John's, 45

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and if not, then we use the else statement. 46

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Let's copy this one here. 47

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In this case, John's BMI is higher than Mark's, 48

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and actually let's log both of them 49

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to the console here first, 50

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just so we see if our if/else statement 51

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is working as expected. 52

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So BMIMark and BMIJohn. 53

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As you see here, the VS code autocompletion is pretty smart. 54

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Give it a safe, let's try that, 55

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and we see John's BMI is higher than Mark's. 56

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So this one is Mark's, this one is John's, 57

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and indeed John's BMI is higher. 58

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Basically this condition here turned out to be false 59

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and the else block was executed. 60

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Let's try the same now with this first set of data here, 61

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and I'm commenting them out again using command slash 62

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or control slash on Windows. 63

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I need to comment out this one, 64

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okay, give it a safe, 65

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and now we should see the opposite. 66

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Indeed, now Mark's BMI is higher than John's. 67

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That is part one, 68

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and now part two is to actually write a template string, 69

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or this would be called a template literal. 70

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We just fix that. 71

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We should use a template literal 72

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to include the actual BMI values, 73

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so like this here between parenthesis. 74

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So, let's do that. 75

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We're going to transform this to backticks. 76

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That's the first thing, 77

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and then let's see the template again. 78

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Okay, so after the BMI we include two parenthesis 79

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and then in the parenthesis 80

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is where we want the actual value. 81

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This is where we put essentially the placeholder. 82

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Here we will put BMIMark 83

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and here BMIJohn. 84

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Now let's just copy this to make it a bit faster. 85

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Mark, and down here, John. 86

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Okay, let's see. 87

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Yeah, that works just fine. 88

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Cool, so with this we solved the challenge, 89

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and again, if you did it in a slightly different way, 90

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don't worry at all. 91

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That's completely normal and it's actually a good thing. 92

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It means that you're basically finding 93

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your own style of coding, which is a really a good thing 94

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so don't worry about that. 95

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What matters is that you actually used an if/else statement. 96

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That was, of course, mandatory. 97

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Otherwise you couldn't have made this work at all. 98

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All right, so this was a lot of fun 99

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because we actually made our code do something now. 100

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I hope you can really feel that as well.