Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops The Refactor Challenge

Posted by Alexander D
Alexander D
8,685 Points

Why am I getting 11 dots?

Hello there,

I saw great codes for this challenge. A little disappointed as I was forced to see into the solution. Still, I am getting 11 dots rather than 10, why is that?

My code is the following (I know it can be made way drier):

var i;
var html = '';
var red;
var green;
var blue;
var rgbColor = 'rgb(' + red + ',' + green + ',' + blue + ')';

function getRandomColors () {

red = Math.floor(Math.random() * 256 );
green = Math.floor(Math.random() * 256 );
blue = Math.floor(Math.random() * 256 );
rgbColor = 'rgb(' + red + ',' + green + ',' + blue + ')';
html = '<div style="background-color:' + rgbColor + '"></div>';
document.write(html);

}

for (i = 0; i <= 10; i++) {

 getRandomColors();
}

Thanks for your support!

1 Answer

Robin Siegl
Robin Siegl
11,157 Points
Robin Siegl
Robin Siegl
11,157 Points

This for loop runs until the variable i is not less or equal than 10.
i = 0 -> Loop runs
i = 1 -> Loop runs
i = 2 -> Loop runs
i = 3 -> Loop runs
i = 4 -> Loop runs
i = 5 -> Loop runs
i = 6 -> Loop runs
i = 7 -> Loop runs
i = 8 -> Loop runs
i = 9 -> Loop runs
i = 10 -> Loop runs

i = 11 -> Loop doesn't run anymore

To solve this you need to remove the equal sign: 

for (i = 0; i < 10; i++) {
 getRandomColors();
}
Alexander D
Alexander D
8,685 Points

Thanks, I lost myself in a glass of water!

I do appreciate your response! :)