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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Exiting Loops

Posted by Tyrel Kessinger
Tyrel Kessinger
8,414 Points

Absolutely Cannot Get Code to Run

No matter what I try, clearing the cache, re-starting my computer, running other browsers I CANNOT get the code for any of the Loops, Arrays and Objects to run in Workspace. I've pored over the code a million times and I'm not seeing anything that prevents this so any help would be appreciated (before I dropkick the laptop through the window!) Thanks for any help!

HTML side:

<!DOCTYPE html> <html lang ="en"> <head> <meta charset="UTF-8"> <title>Let's Make Random Numbers</title>
<link rel="stylesheet" href="styles.css"> </head> <body> <h1>Let's Make Random Numbers</h1>
<script src="scripts.js"></script> </body> </html>

JavaScript code:

var randomNumber = getRandomNumber(10); var guess; var guessCount = 0; var correctGuess = false;

function getRandomNumber( upper ) { var num = Math.floor(Math.random() * upper) + 1; return num; }

do { guess = prompt('I am thinking of a number between 1 and 10. What is it?'); guessCount += 1; if (parseInt(guess) === randomNumber) { correctGuess = true; }
} while ( ! correctGuess )

document.write('<h1>You guessed the number!</h1>'); document.write('It took you ' + guessCount + ' tries to guess the number ' + randomNumber);

6 Answers

anil rahman
anil rahman
7,786 Points
anil rahman
anil rahman
7,786 Points 
<!DOCTYPE html> 
<html lang ="en"> 
<head> 
   <meta charset="UTF-8">
   <title>Let's Make Random Numbers</title>
   <link rel="stylesheet" href="styles.css"> 
</head> 
<body> 
   <h1>Let's Make Random Numbers</h1>
   <script src="scripts.js"></script>
 </body> 
</html>

  //JavaScript code:

   var randomNumber = getRandomNumber(10); 
   var guess; 
   var guessCount = 0; 
   var correctGuess = false;

   function getRandomNumber( upper ) 
   { 
       var num = Math.floor(Math.random() * upper) + 1; 
       return num; 
    }

   do 
   { 
        guess = prompt('I am thinking of a number between 1 and 10. What is it?'); 
        guessCount += 1; 

        if (parseInt(guess) === randomNumber) 
        { 
          correctGuess = true; 
        }
   } while ( ! correctGuess )

   document.write('<h1>You guessed the number!</h1>'); 
   document.write('It took you ' + guessCount + ' tries to guess the number ' + randomNumber);
anil rahman
anil rahman
7,786 Points
anil rahman
anil rahman
7,786 Points

formatted for people to read easily

Adam Brown
Adam Brown
12,453 Points
Adam Brown
Adam Brown
12,453 Points

You have a ton of extra whitespace characters, especially in your HTML. I'm not sure if that's you or a result of copy/pasting carriage returns. It also looks like you're missing a semi-colon after the "while" statement at the end of your do/while loop.

Eric Thompson
Eric Thompson
9,858 Points
Eric Thompson
Eric Thompson
9,858 Points

I am experiencing the same as well: the code does not run despite having written an exact mirror copy of what Dave has written. I have also experienced this with another lesson as well. If I remember correctly, I switched to Safari and it worked then (currently using Chrome).

Adam Brown
Adam Brown
12,453 Points
Adam Brown
Adam Brown
12,453 Points

Eric Thompson Different browsers allow you to get away with different errors.

If I were you, I'd run it through a Javascript validator like JSLint. JSLint is EXTREMELY picky and will find errors in your code. Some of them (like for loops) are highlighted as errors even though they aren't actual errors.

If you're NOT using Workspaces, another good troubleshooting tool is to open up console on your browser. Ctrl+Alt+i for Windows, Cmd+Alt+i for Mac

Eric Thompson
Eric Thompson
9,858 Points
Eric Thompson
Eric Thompson
9,858 Points

Thanks Adam. I will definitely try your suggestions

Ayaz Hussein
Ayaz Hussein
13,348 Points
Ayaz Hussein
Ayaz Hussein
13,348 Points

What do you mean by code not running? no prompt appears? if so, try to force refresh the browser, I had the same problem but it worked with a force refresh Windows: ctrl + F5 Mac/Apple: Apple + R or command + R Linux: F5

EDIT: just noticed, check the 

<script src="scripts.js"></script>

as far as I know, on my workspace , it was in a folder named "js" when I did it so I think you have to add 

<script src="js/scripts.js"></script>
Tyrel Kessinger
Tyrel Kessinger
8,414 Points

Thanks for the responses but neither of these will give me a successful preview of the code. As I've stated, I've cleared the cache countless times, restarted he computer several times and tried different browsers all to no avail

Ayaz Hussein
Ayaz Hussein
13,348 Points
Ayaz Hussein
Ayaz Hussein
13,348 Points

by previewing the code as in the prompt won't appear?

Tyrel Kessinger
Tyrel Kessinger
8,414 Points

Yes, when previewing the code. Nothing happens. Just a blank page in Chrome or whatver browser I use. It's becoming incredibly frustrating.

Ziv Peer
Ziv Peer
1,677 Points
Ziv Peer
Ziv Peer
1,677 Points

for me prompt worked, problem is in: function getRandomNumber( upper ){}

from where u getting value for "upper"? Please check it.