Question

Write a program that uses for loops to perform the following steps:

 Output the sum of all even numbers between firstNum and secondNum

Answer 1

#include <iostream>


using namespace std;


int main()
{
    int firstNum, secondNum;
    cout << "Enter first number: ";
    cin >> firstNum;


    cout << "Enter second number: ";
    cin >> secondNum;


    int sumOfAllEvens = 0;
    for(int i = firstNum; i <= secondNum; i++)
    {
        if(i%2==0)
            sumOfAllEvens += i;
    }
    cout << "Sum of all even numbers: " << sumOfAllEvens << endl;
    return 0;
}