Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops The Refactor Challenge, Part 2

Mark Bacolcol
Mark Bacolcol
7,354 Points

What is the Purpose of this Variable?

In the solution video Dave has the following code:

for (var i = 0; i < 100; i += 1) {
  rgbColor = randomColor();
  html += '<div style="background-color:' + rgbColor + '"></div>';
}

My question is, what is the purpose of the "rgbColor" variable? Is there something wrong or inefficient with directly calling the function within the string? They both seem to work fine. The latter can be seen below.

for (var i = 0; i < 100; i += 1) {
  html += '<div style="background-color:' + randomColor() + '"></div>';
}

1 Answer

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,040 Points

rgbcolor is probably helping limit the values return to rgbcolor ranges. Since RGB values only go up to 255 you can only get so many values before the function would break.