// Fig. 2.20: fig02_20.cpp
// Summation with for.
#include <iostream>

using std::cout;
using std::endl;

// function main begins program execution
int main()
{
   int sum = 0;                       // initialize sum

   // sum even integers from 2 through 100
   for ( int number = 2; number <= 100; number += 2 )
      sum += number;                  // add number to sum

   cout << "Sum is " << sum << endl;  // output sum
   return 0;                          // successful termination

} // end function main




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