Truly random number - If srand won't generate duplicate number, what happen if the range of random number finish generated?

Question

If 1+rand()%6 gives 1-6, does it mean after it generates 6 times the program will halt or reset the pool and generate again?

Answer 1

No. The output of rand and the modulo are two separate things.

rand will only start to give the same numbers after 2^32 times.

Answer 2

I know but is there a way to achieve truly random number without using mt19937 and array+rand?