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JavaScript JavaScript Basics Making Decisions in Your Code with Conditional Statements Use Multiple Conditions

Posted by Micheal Jones
Micheal Jones
3,972 Points

Dont really know if Im going about this the right way.

What im I doing wrong here.

script.js 
const money = 9;
const today = 'Friday'

if ( money > 10 || today === 'Friday' ) {
  alert("Its Friday but I dont have enough money to go out.");    
}
index.html 
<!DOCTYPE HTML>
<html>
  <head>
    <meta charset="utf-8">
    <title>JavaScript Basics</title>
  </head>
  <body>
    <script src="script.js"></script>
  </body>
</html>

1 Answer

Phil Wright
Phil Wright
3,654 Points
Phil Wright
Phil Wright
3,654 Points

Hey Michael

There are a couple of different things going on here and the example in the challenge is useful because you can work your way through it, reading the conditional statements and seeing if they make sense.

If they don’t then that is likely where a problem would occur.

I'll add some comments after each conditional statement that describe what each is doing. Hopefully, that will help you see what is happening.

Phil

const money = 9;
const today = 'Friday'

if ( money > 10 || today === 'Friday' ) { 
    // money is greater than 10 OR today is exactly "Friday"
    alert("Time to go to the theater.");    
} else if ( money >= 50 || today === 'Friday' ) {
    //money is greater or equal to 50 OR today is exactly "Friday"
    alert("Time for a movie and dinner.");    
} else if ( today !== 'Friday' ) { 
     // today does not exactly equal "Friday"
    alert("It's Friday, but I don't have enough money to go out.");   
} else { 
     // Anything else
    alert("This isn't Friday. I need to stay home.");
}

NB: As soon as any condition is met, the code will progress to the relevant alert line and the rest of the script never runs.

Things to consider:

  • Remember that || in a conditional means OR, this will match any conditions
  • Where && in a conditional means AND, this must match all conditions
  • Using the wrong operator might be generating a false positive
  • When testing the value of today, make sure you have the right equality operator

Have a look at this instead.

Tweaks made to get the conditionals doing what we want them to.

const money = 9;
const today = 'Friday'

if ( money > 10 && today === 'Friday' ) {
    // Must have BOTH more money than 10 AND it be Friday
    alert("Time to go to the theater.");    
} else if ( money >= 50 && today === 'Friday' ) { 
    // Must have BOTH at least 50 AND it be Friday
    alert("Time for a movie and dinner.");    
} else if ( today === 'Friday' ) { 
    // If you don't have enough money for either of those, but it is Friday
    alert("It's Friday, but I don't have enough money to go out.");   
} else {
    // Last option must not be Friday as we've exhausted our Friday and money options
  alert("This isn't Friday. I need to stay home.");
}
Micheal Jones
Micheal Jones
3,972 Points

Thanks man for really breaking it down like this I appreciate it.