C++ program to find sum of n numbers using while loop

In this example, you will learn to find the sum of n numbers in the c++ program by using a while loop.

Example:

input:10
output: 55 

sum of 10 number are 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55

#include <iostream>
using namespace std;

int main() {
    int n, sum = 0,i=1;

    cout << "Enter a positive number: ";
    cin >> n;

    while(i <= n)
    {
        sum += i;
        i+=1;
    }
    cout << "Sum = " << sum;
    return 0;
}

Enter a positive number: 5
Sum = 15

1. Take a number from the user store in n. 
2. Iterate while loop until i value equal to n.
3. Inside while loop adds i value in sum value.
4. When the loop breaks print the sum of the n values.