get sum of range

To get the sum of a range in C++, you can use a loop to iterate through the numbers within the range and add them up. Here's an example code with explanations for each step:

#include <iostream>

int main() {
    int start = 1; // starting number of the range
    int end = 10; // ending number of the range
    int sum = 0; // variable to store the sum

    for (int i = start; i <= end; i++) {
        sum += i; // add the current number to the sum
    }

    std::cout << "The sum of the numbers from " << start << " to " << end << " is: " << sum << std::endl;

    return 0;
}

Explanation:

1. We include the <iostream> library to be able to use the std::cout and std::endl functions for output.

2. We declare and initialize three variables: start, end, and sum. start represents the starting number of the range, end represents the ending number of the range, and sum will store the sum of the numbers.

3. We use a for loop to iterate through the numbers within the range. The loop variable i is initialized with the value of start, and it will continue as long as i is less than or equal to end. After each iteration, i is incremented by 1.

4. Inside the loop, we add the current value of i to the sum using the += operator. This accumulates the sum of all the numbers within the range.

5. After the loop, we use std::cout to display the result. We output a message that includes the starting and ending numbers of the range, along with the calculated sum.

6. Finally, we return 0 to indicate successful execution of the program.

By running this code, you will get the sum of the numbers from the specified range.