For loop problem

[GeneralOJB]

Hey

Why doesn't this work:

PHP Code:

#include <iostream.h>
int main() {
   int x = 0;
   int i;
   for (i = 1; i <= 100; i++)  {
     x += i;
   }
   cout << x << endl;
   return 0;
} 


For 'x', I should be getting the same as 'i' (1 going down to 100) but I get 5050.

Does anyone know what the problem is?

P.S - I'm learning from a book, so any mistakes are Jeff Cogswell's fault.