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JavaScript JavaScript Basics (Retired) Working With Numbers Create a random number

Ignacio Van Humbeeck
Ignacio Van Humbeeck
2,150 Points
Posted by Ignacio Van Humbeeck
Ignacio Van Humbeeck
2,150 Points

Why not simply use Math.round? I test it and it also gives me 6 sometimes

Math.round( Math.random() * 6);

1 Answer

Chris Chang
Chris Chang
6,143 Points
Chris Chang
Chris Chang
6,143 Points

Hi Ignacio,

Math.random function returns a random number between 0 (inclusive) and 1 (exclusive), which means that it may be possible that the function will return something like 0.00001, and if you use this number and multiple by 6. It will return 0.00006.

When you pass in 0.00006 as the argument to the Math.round function, it will actually round down, and since the dice doesn't have a number 0, you wouldn't want to use this even if the probability of getting a 0 is low.

In this case, Math.floor(Math.random() * 6) + 1 would work best.

Hope this helps :)

-Chris