Well, rand can be defined as a Linear Congruential Generator (https://en.wikipedia.org/wiki/Linear_congruential_generator https://en.wikipedia.org/wiki/Linear_c

Well, rand can be defined as a Linear Congruential Generator (https://en.wikipedia.org/wiki/Linear_congruential_generator https://en.wikipedia.org/wiki/Linear_congruential_generator), or some other well known algorithm. LCG's don't require anything that the machine doesn't already do (mod, addition and multiplication)