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JavaScript

Posted by Desmond Dallas
Desmond Dallas
6,985 Points

spot the fault

Hi, can anyone see where the fault is here. Ive looked over and over and sure its the same codefrom the video.

var input1 = prompt("Please type a starting number"); var bottomNumber = parseInt(input1); var input = prompt("Please type a number"); var topNumber = parseInt(input); var randomNumber = Math.floor(Math.random() * (topNumber – bottomNumber + 1)) + bottomNumber; var message = "<p>" + randomNumber + " is a number between " + bottomNumber + " and " + topNumber + ".</P>"; document.write(message);

3 Answers

Tom Gooding
Tom Gooding
16,735 Points
Tom Gooding
Tom Gooding
16,735 Points

You have an "en dash" "–" rather than a hyphen "-" as the subtraction symbol in your randomNumber variable.

var randomNumber = Math.floor(Math.random() * (topNumber - bottomNumber + 1)) + bottomNumber;
Desmond Dallas
Desmond Dallas
6,985 Points

I still cant see exactly where you are referring to?

Tom Gooding
Tom Gooding
16,735 Points
Tom Gooding
Tom Gooding
16,735 Points

See how the subtraction symbol where you subtract bottomNumber from topNumber is different? Just a typo. Are you using a text editor with syntax highlighting?

Your original code:

var input1 = prompt("Please type a starting number"); 
var bottomNumber = parseInt(input1); 
var input = prompt("Please type a number"); 
var topNumber = parseInt(input); 
var randomNumber = Math.floor(Math.random() * (topNumber – bottomNumber + 1)) + bottomNumber;  //this line
var message = "<p>" + randomNumber + " is a number between " + bottomNumber + " and " + topNumber + ".</p>";
document.write(message);

Changed to hyphen:

var input1 = prompt("Please type a starting number"); 
var bottomNumber = parseInt(input1); 
var input = prompt("Please type a number"); 
var topNumber = parseInt(input); 
var randomNumber = Math.floor(Math.random() * (topNumber - bottomNumber + 1)) + bottomNumber; //this line
var message = "<p>" + randomNumber + " is a number between " + bottomNumber + " and " + topNumber + ".</p>";
document.write(message);
Desmond Dallas
Desmond Dallas
6,985 Points
Desmond Dallas
Desmond Dallas
6,985 Points

Thanks