Program to find sum of first n natural numbers in C++

In this tutorial, we will be discussing a program to find sum of first n natural numbers.

For this we will be provided with an integer n. Our task is to add up, find the sum of the first n natural numbers and print it out.

Example

 Live Demo

#include<iostream>
using namespace std;
//returning sum of first n natural numbers
int findSum(int n) {
   int sum = 0;
   for (int x=1; x<=n; x++)
      sum = sum + x;
   return sum;
}
int main() {
   int n = 5;
   cout << findSum(n);
   return 0;
}

Output

15

Ayush Gupta

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Updated on: 27-May-2020

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