C++ for statement loop initialization, condition, and altering statements

#include <iostream>
#include <iomanip>
using namespace std;
int main()//from  ww  w .  j av  a2  s.  co  m
{
   int num, final;
   cout << "Enter the final number for the table: ";
   cin  >> final;
   cout << "NUMBER SQUARE CUBE\n";
   cout << "------ ------ ----\n";
   for (num = 1; num <= final; num++)
      cout << setw(3) << num << setw(8) << num * num << setw(7) << num * num * num << endl;
   return 0;
}