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wesbos/gist:9253844

Created February 27, 2014 16:41
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// Why do we use:
Math.floor(Math.random() * 6) + 1;
// vs
Math.ceil(Math.random() * 6);
@zouloux
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zouloux commented Feb 27, 2014

Maybe because Math.ceil(0) == 0 and Math.floor(0) + 1 == 1 ? Just 2 different things :)

@peterc
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peterc commented Feb 27, 2014

Yeah, the latter could potentially be 0 very rarely, when you wanted 1 through 6.

I just made an app that ran 100 billion times and Math.random was never 0 but formally it could be.

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