Why does the rand() happens to be different?

Question

I'm learning C++ but one question
Why is this code
#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
cout << rand();
}
Is different in the output that Sololearn did

Answer 1

It returns random value😃
https://www.sololearn.com/learn/CPlusPlus/1638/?ref=app
If you want to know the algorithm behind it. just reply me

Answer 2

Roneel is right,it will generate any random number so it will always differ when compiled
..

Answer 3

Thanks guys it really appreciated