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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
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 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)