Math.random on non whole numbers
coronasdk, lua
Solution
Lua's `math.random()` with two arguments returns an integer within the specified range.
When called with no arguments, it returns a pseudo-random real number in between 0.0 and 1.0.
To get real numbers in a specified range, you need to do your own scaling; for example:
math.random() * 0.8 + 0.1
will give you a random real number between 0.1 and 0.9. More generally:
math.random() * (hi - lo) + lo
which you can wrap in your own function if you like.
But I'll note that that's a fairly peculiar range. If you really want a random number selected from 0.1, 0.2, 0.3, 0.4, ..., 0.9, then you should generate an integer in the range 1 to 9 and then divide it by 10.0:
math.random(1, 9) / 10.0
Keep in mind that most real numbers cannot be represented exactly in floating-point.
Problem
How can I generate numbers that are less than 1? for example i would like to generate numbers from 0.1 to 0.9 what I've tried: ``` math.random(0.1,0.9) ```