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

Posted by Dhakirah Mayers
Dhakirah Mayers
2,116 Points

I have no idea what is wrong

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

if ( money > 10 // today === 'Friday' ) { 
  alert("Time to go to the theater.");    
} else if ( money >= 50 // today === 'Friday' ) { 
  alert("Time for a movie and dinner.");    
} else if ( today // 'Friday' ) {
  alert("It's Friday, but I don't have enough money to go out.");   
} else {
  alert("This isn't Friday. I need to stay home.");
}
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

jb30
jb30
44,807 Points
jb30
jb30
44,807 Points

// is used in JavaScript to add a comment to the code. Anything after // on the same line will be ignored.

|| is used in JavaScript when checking if at least one of the conditions before or after it is truthy.

&& is used in JavaScript to determine if the condition before it and the condition after it are both truthy.

To check if today is strictly equal to 'Friday', use today === 'Friday'.

If money > 10 is false and it is Friday, it is not the case that money >= 50 and it is Friday, so the first else if condition will never be true. Switching the order from

if ( money > 10) { 
  alert("Time to go to the theater.");    
} else if ( money >= 50 ) { 
  alert("Time for a movie and dinner.");  
}

to

if ( money >= 50 ) { 
  alert("Time for a movie and dinner.");  
} else if ( money > 10 ) { 
  alert("Time to go to the theater.");    
}

would allow alert("Time for a movie and dinner."); to be reachable.