How random function work?

Question

anyone can explain to me how random function work?algorithm is enough

Answer 1

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main () {
srand(time(0));
for (int x = 1; x <= 1000; x++) { //change x
cout << 1 + (rand() % 1000) << endl; //you can change the range here above 1000 or watever you want
}
}

Answer 2

they do random things