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

Math floor to include the last number

what is the different between the two codes or which one should I use to include number 6 Math.floor(Math.round() * 6) + 1; and Math.floor(Math.round() * 7)

1 Answer

Steven Parker
Steven Parker
215,984 Points

The first one (where you multiply by 6 and add 1) will give you a number from 1 to 6.

The second one (multiply by 7) will give you a number between 0 and 6.

Both include 6, and you didn't mention what this might be used for; but if you're trying to emulate rolling dice, the first one would be the correct formula.