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JavaScript JavaScript Basics (Retired) Working With Numbers The Random Challenge Solution

M W
M W
3,446 Points
Posted by M W
M W
3,446 Points

Prompt box will not appear unless I delete the next lines of code!

I am doing the random number challenge which seems fine except I cannot get the prompt dialogue box to appear. If I remove the code after the prompt line it works...I thought the code was run in sequence so even if my code after the prompt line is wrong, then the prompt box wold still appear then I would get an error. Any thoughts please? Thank you :)

P.S. I know the remaining code needs finishing - I'm just stuck with the Prompt issue....:)

var input = prompt("Please enter any number and I will give you a random number from 1 up to the number you give me!");

var finalUserNumber = parseInt(input);

var result = Math.floor(Math.random() * finalUserNumber) + 1);

alert('Your random number is ' + result);

4 Answers

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

:point_right: You have an extra closing parenthesis on this line:

var result = Math.floor(Math.random() * finalUserNumber) + 1);

You can either remove the last one (my recommendation), remove the one before the "+", or add another open parentheses before or after "Math.floor".

Syntax errors are detected before the script begins running, and prevent execution.

Konstantin Kovar
Konstantin Kovar
16,003 Points
Konstantin Kovar
Konstantin Kovar
16,003 Points

There is an access ')' on the third line. This should fix the problem. The line should be:

var result = Math.floor(Math.random() * finalUserNumber + 1);

I'm sorry I don't really know a lot about what's going on under the hood, so I can't tell you why an error on line 3 would prevent line 1 from working, but it's possible (apparently).

Erik Nuber
Erik Nuber
20,629 Points
Erik Nuber
Erik Nuber
20,629 Points

have you tried testing in the console. I would try finding out if there is an error and, entering input to see what it gives back. It looks correct here so you may want to make sure your html file has the javaScript file connected properly.

That or make a simple test and put 

alert('hello');

just to see if anything is actually running.

M W
M W
3,446 Points
M W
M W
3,446 Points

seems it was the extra parenthesis later on in the code :)

M W
M W
3,446 Points
M W
M W
3,446 Points

Thanks everyone for crazily speedy responses. I had no idea that syntax errors throughout program were checked before executing the code! I must have missed that somewhere. Thanks again :)