Answer to Question #130544 in C++ for Zaib Mk

Question

Develop a program that will calculate the sum of every third integer beginning with i=2 calculate (i-e calculate the sum of series 2+5+8+…………) for all values of i that are less than 100?

Write the loop each of the following ways
a) Using for loop
b) Using do-while loop
c) Using while loop

Answer 1

#include <iostream>


int main()
{
    int sum = 0;
    for(int i = 2; i < 100; i += 3)
    {
        sum += i;
    }
    std::cout << "Sum is " << sum;
    return 0;

}

#include <iostream>


int main()
{
    int i = 2;
    int sum = 0;
    while(i < 100)
    {
        sum += i;
        i += 3;
    }
    std::cout << "Sum is " << sum;
    return 0;

}

#include <iostream>


int main()
{
    int i = 2;
    int sum = 0;
    do
    {
        sum += i;
        i += 3;
    } while(i < 100);
    std::cout << "Sum is " << sum;
    return 0;

}