1.13a

#include <iostream>

using namespace std;

int main()
{
    int sum = 0;
    // sum values from 50 through 100 inclusive.
    for (int val = 50; val <= 100; ++val)
        sum += val;  // equivalent to sum = sum + val
    cout << "The sum of 50 to 100 inclusive is " << sum << endl;

}