What will return this function? (Math.random())

What range of Numbers? Seriously, I got headache trying to figure it out -_-

public function gerRandom(i:uint):uint {
        return Math.round(Math.random()*i);
}

Whole numbers from 0 to i including? I need these. 开发者_StackOverflow中文版A kind of a noob question, but whatever :D

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Math.random() will create a number from 0 to 1 (not including 1). So your code would create a value between 0 and i, with less chance to get 0 and i compared to the other values in the range (it will only round down to 0 on a 0.5 or less, and up to 'i' on a 'i'-0.5 or more).

A better way is to use

public function getRandom(from:uint, to:uint):uint {
  return Math.floor(Math.random()*(to-from+1))+from;
}

(iirc).

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Will return whole number from 0 to i, both inclusive, but not with equal probability. You'll get 0 if Math.random()*i is the interval [0, 0.5), but you get 1 if it's in [0.5, 1.5].

Use Math.floor(Math.random() * (i + 1)) instead.

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An integer between 0 and i (both included) :)

• Math.random() return a value between 0 and 1
• Math.random*i return a number between 0 and i
• Math.round(Math.random()*i) returns an integer between 0 and i.