How can I generate a single random number?

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I need to generate a single random number within my code. Is there a function to do this?

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 3 Sep 2013
Edited: Azzi Abdelmalek on 3 Sep 2013
rand % random number between 0 and 1
%or
randi(100) % integer random number between 1 and 100
  2 Comments
Samuel Katongole
Samuel Katongole on 27 Mar 2020
That's is fine for the range 0 to 100; but how about with no range, say for, instance, from 0 to infinity?
Steven Lord
Steven Lord on 27 Mar 2020
The maximum value you can store in double precision is realmax, which is about 1e307. So no, you can't generate double precision values greater than that (or you can, they just turn out to be Inf.)
>> x = 1e500
x =
Inf
Can you generate an arbitrary double precision number between 0 and realmax? There's no function in MATLAB to do so.
Can you share some details about what you're trying to do with these numbers "with no range"? There may be a way to do what you want that doesn't run into this problem of overflowing to Inf.

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