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 Basics (Retired) Working With Numbers Review Working with Numbers

Mickey Odunikan
Mickey Odunikan
7,392 Points
Posted by Mickey Odunikan
Mickey Odunikan
7,392 Points

This script never produces a 0 how is it wrong? Math.ceil(Math.random() *6)

This script never produces a 0 how is it wrong? Math.ceil(Math.random() *6)

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

You should use floor not ceil

Mikołaj Gonciarz
Mikołaj Gonciarz
8,078 Points
Mikołaj Gonciarz
Mikołaj Gonciarz
8,078 Points

.ceil() method rounds up to the closest higher number e.g 0.01 i rounded to 1 .floor() method rounds up to the closest lower number e.g 0.01 i rounded to 0

Since .random() method return a random number between 0 (inclusive) and 1 (exclusive) there is actually a possibility 0 will be returned. Yet if you want to be sure that you will get a number from 0 to 6 inclusive on both end of range, with equal probability than I suggest: Math.floor(Math.random()*7)