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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Build a Random Number Guessing Game

Posted by Andrea Faciane
Andrea Faciane
10,042 Points

unable to see results

var random = Math.floor(Math.random() * 6 ) + 1;
var guess = prompt ('I am thinking of a number between 1 and 6.What is it?');
if (parseInt(guess) === randomNumber) {
 document.write('<p>You guessed the number!</p>'); 
} else {
  document.write('<p>Sorry. the number was ' + randomNumber + ' </p>');
}

6 Answers

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

In your program, you are trying to say parseInt(guess) === randomNumber although the randomNumber variable doesn't exist.

You only created two variables: guess and random. To fix your program, you can either change randomNumber to random or you can rename the variable at the beginning (where your defined the variable) to randomNumber.

Either way, both the variable used in the condition has to match up with the variable you made.

I hope this helps. :grin:

~Alex

egaratkaoroprat
egaratkaoroprat
16,630 Points

oops, I was too slow :D

egaratkaoroprat
egaratkaoroprat
16,630 Points
egaratkaoroprat
egaratkaoroprat
16,630 Points

The reason is that you put the generated random number in avariable called 'random'. You might want to change the name to 'randomNumber', so it matches with the rest of your code.

If you are working with Chrome, you can open the Dev Tools (F12 on Windows) and switch to the console tab. There you could see that it says 'randomNumber is not defined', which would help you figure out the problem.

Hope this helps!

Andrea Faciane
Andrea Faciane
10,042 Points
Andrea Faciane
Andrea Faciane
10,042 Points

thanks Alex yet changing randomNumber to random resolve the issue. I don't see the results by randomly choosing a number from 1 to 6.

Andrea Faciane
Andrea Faciane
10,042 Points
Andrea Faciane
Andrea Faciane
10,042 Points

I'm not getting a prompt now... please help

var randomNumber = Math.floor(Math.randomNumber() * 6 ) + 1;
var guess = prompt('I am thinking of a number between 1 and 6. What is it?');
if (parseInt(guess) === randomNumber ) {
 document.write('<p>You guessed the number!</p>');
} 
 else {
document.write('<p>Sorry. The number was ' + randomNumber + .</p>');}              }
egaratkaoroprat
egaratkaoroprat
16,630 Points

you accidentally replaced a ' with a . on your last line right before </p>

Andrea Faciane
Andrea Faciane
10,042 Points
Andrea Faciane
Andrea Faciane
10,042 Points

I removed the . and there's no difference.

egaratkaoroprat
egaratkaoroprat
16,630 Points

Please look at this code and see if you can find any differences (hint: I made 3 changes to the code you posted above):

var randomNumber = Math.floor(Math.random() * 6 ) + 1;
var guess = prompt('I am thinking of a number between 1 and 6. What is it?');
if (parseInt(guess) === randomNumber ) {
 document.write('<p>You guessed the number!</p>');
} 
 else {
document.write('<p>Sorry. The number was ' + randomNumber + '</p>');
}

Let me know if something's not clear.

Ismael Barba
Ismael Barba
1,869 Points
Ismael Barba
Ismael Barba
1,869 Points

I run your code Egarat but I don't get the document.write to pop up after I guess a random number?

egaratkaoroprat
egaratkaoroprat
16,630 Points

It works for me. Maybe there is a typo?