Generate random number from 0 to 1

Question

How can I compute random number between 0 inclusive and 1 inclusive? When I have Math.random() it is returning 0-0.9999999

I did not find any solution for that.

edit: I think that it could be somehow this way:

const precision = 1000
let c = 0
let min = 2
let max = -2

while(c !== 20000){
   c++;
   let r = (Math.round(Math.random()*precision)/precision)/0.9999999999999;
   r = Math.round(r*precision)/precision
   max = Math.max(r, max)
   min = Math.min(r, min)
 }
console.log('max:', max, 'min:', min)

Once go through this http://stackoverflow.com/questions/2143723/write-a-truly-inclusive-random-method-for-javascript — Rahul, Jan 13 '17 at 08:59
The probability of getting any particular number from a random float is basically zero. So even if you include `1` you won't ever get it. — fafl, Jan 13 '17 at 09:03
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/133060/discussion-between-v-for-vendetta-and-fafl). — Rahul, Jan 13 '17 at 09:06

score 0 · Answer 1 · answered Jan 13 '17 at 09:03

0

Here is what you're looking for.

Examples #4 on the Mozilla Developer Network

answered Jan 13 '17 at 09:03

Alexander Vilko

17
1

But this is for integers – fafl Jan 13 '17 at 09:04
1

if you exclude the Math.floor, it would be `Math.random() * (max - min + 1) + min;` ... ... or `Math.random() * 1` – Jaromanda X Jan 13 '17 at 09:05
@Jaromanda how does multiplying by 1 change anything? – fafl Jan 13 '17 at 09:18
it doesn't - I was merely pointing out how that code would "work" with a *float* range of 0...1 ... in other words, it would make no difference – Jaromanda X Jan 13 '17 at 09:20

Generate random number from 0 to 1

1 Answers1