We can rewrite this program using a for loop to sum the numbers from 1 through 10 as follows

#include <iostream>
int main()
{
int sum = 0;
// sum values from 1 through 10 inclusive
for (int val = 1; val <= 10; ++val)
sum += val; // equivalent to sum = sum + val
std::cout << "Sum of 1 to 10 inclusive is "
<< sum << std::endl;
return 0;
}

Output:

Sum of 1 to 10 inclusive is 55