How to generate random float in lua?

Question

I need to generate random float in Lua. It needs to be > 1, so math.random() is not a solution.

How can I do this?

Oh, I forgot to say: I need float > 1, so, math.random() not is sollution. — user0103, Jul 18 '12 at 18:36

score 14 · Accepted Answer · edited Jul 18 '12 at 18:57

14

This should generate random floats between 1 (inclusive) and 100 (exclusive)

math.random() + math.random(1, 99)

edited Jul 18 '12 at 18:57

Bart Kiers

answered Jul 18 '12 at 18:39

peacemaker

math.random(1, 100) will do the same – Stomp Nov 12 '12 at 23:03
1

@Stomp `math.random(1,100)` generates random _integers_ within that range, not floats. – Phrogz Dec 23 '14 at 16:11

score 12 · Answer 2 · answered Aug 13 '13 at 12:52

12

You can also use something like this to get a number between lower and greater

function randomFloat(lower, greater)
    return lower + math.random()  * (greater - lower);
end

answered Aug 13 '13 at 12:52

Stals

It still could be helpfull for people that find this question – Stals Aug 14 '13 at 07:50
This helped me out tremendously. Thanks for posting! – klewis Jul 15 '21 at 17:55

score 3 · Answer 3 · answered Jul 21 '12 at 04:43

3

Just posting for fun, but you can use math.random() with no arguments to do this :P

print(math.floor((math.random()*100)+0.5))

answered Jul 21 '12 at 04:43

Nathan

3 Answers3