How can I generate numbers between 7 to 10? So far all I've figured out is generating in a range from 0-10:
Math.floor(Math.random()*11)
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2asked soooo many times previously....Mitch Wheat– Mitch Wheat2011-07-15 02:43:45 +00:00Commented Jul 15, 2011 at 2:43
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6And the difference between 7 (which you want) and 0 (which you can generate) is how much?S.Lott– S.Lott2011-07-15 02:50:53 +00:00Commented Jul 15, 2011 at 2:50
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The more comments of S.Lott's that I read, particularly the late-night ones, the more I like him.Jordan– Jordan2011-07-15 03:19:14 +00:00Commented Jul 15, 2011 at 3:19
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4 Answers
function getRandom(min, max) {
return min + Math.floor(Math.random() * (max - min + 1));
}
for(var x = 0; x < 5; x++) {
console.log(getRandom(7, 10));
}
5 Comments
jfriend00
+1 for making it a general purpose function based on min, max.
NullVoxPopuli
multiplying random by (max-min) doesn't give you the range you want. Min needs to be a sort of "b" in the metaphorical mx+b here.
Jordan
@NullVoxPopuli, have you tried it? 43 satisfied customers so far, and I just checked the distribution range on it and it looks right to me. Here's a fiddle: jsfiddle.net/UCX9c/1
NullVoxPopuli
oh hey, I didn't see the min at the beginning of that. lol. I thought you were just doing random() * max-min
Jordan
Ah, gotcha. Interesting to think of a random number within a range as the slope of a line. I tend to think of it as a set instead. Cool mental trick though. I'm sure a math person would laugh at me.
Math.floor(7 + Math.random() * 4) will generate numbers from 7 to 10 inclusive.
Comments
Just say this:
Math.floor(Math.random()*4) + 7
This will generate a random number from 0-3 and then add 7 to it, to get 7-10.
Comments
7 + Math.floor(Math.random()*4)
