Write a C++ Program to Calculate Sum of Natural Numbers

write-a-c++-program-to-calculate-sum-of-natural-numbers

Calculating the sum of natural numbers is a fundamental programming problem that can be easily solved using C++ programming language.

In this tutorial, we will demonstrate how to write a simple program to calculate the sum of natural numbers using C++.

To begin, we need to understand what natural numbers are. Natural numbers are a set of positive integers that start from 1 and go on indefinitely.

In other words, natural numbers are 1, 2, 3, 4, 5, and so on. The sum of the first n natural numbers is given by the formula:

sum = 1 + 2 + 3 + … + n = n(n+1)/2

Now, let’s write a C++ program that calculates the sum of natural numbers up to a given limit.

#include <iostream>
using namespace std;

int main()
{
    int n, sum = 0;
    cout << "Enter the value of n: ";
    cin >> n;

    for(int i=1; i<=n; i++)
    {
        sum += i;
    }

    cout << "The sum of first " << n << " natural numbers is: " << sum << endl;
    return 0;
}

In the above program, we first declare two integer variables, n and sum, to store the input and the sum of natural numbers, respectively.

We then prompt the user to enter the value of n using the cout and cin statements.

Next, we use a for loop to iterate through the natural numbers from 1 to n. Inside the loop, we add each number to the variable sum.

Finally, we use the cout statement to display the result of the sum of the first n natural numbers.

That’s it! This simple program should give you an output of the sum of natural numbers for a given limit.

In conclusion, C++ is a powerful programming language that allows you to perform various arithmetic operations.

The program we demonstrated in this blog post is a basic example of how to use C++ to calculate the sum of natural numbers.

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