I can\'t get my head around this, which is more random?
rand()
OR:
rand() * rand()
I´m f
Floating randoms are based, in general, on an algorithm that produces an integer between zero and a certain range. As such, by using rand()*rand(), you are essentially saying int_rand()*int_rand()/rand_max^2 - meaning you are excluding any prime number / rand_max^2.
That changes the randomized distribution significantly.
rand() is uniformly distributed on most systems, and difficult to predict if properly seeded. Use that unless you have a particular reason to do math on it (i.e., shaping the distribution to a needed curve).