[C++]外层循环执行1次，内层循环执行1轮

#include <iostream>
using namespace std;
int main() {
//外层循环执行1次，内层循环执行1轮
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 10; j++)
{
cout << j << " ";
}
cout << endl;
}
system("pause");
return 0;
}