C Program to calculate the sum of Natural Numbers

Published on December 13, 2016 by Senthil Kumar

Filed under C

Last modified December 13, 2016

Print this page

rate 1 star rate 2 star rate 3 star rate 4 star rate 5 star
Your rating: none, Average: 0 (0 votes)

This article have been viewed 6313 times


Write a program in C to take the input (n) from the user and calculate the sum of all the natural numbers from 1 to n.

How to calculate the sum of natural numbers in C language ?

#include <stdio.h>
int main()
    printf("Abundantcode.com coding sample\n");
    int n, index, result = 0;
    printf("Enter a positive number : ");

    for(index=1; index <= n; ++index)
        result += index; 

    printf("Result = %d",result);

    return 0;


Abundantcode.com coding sample                                               
Enter a positive number : 4                                                
Result = 10

Leave a Comment


You might be Interested in these Posts

C Program to convert lower case string to upper case

Problem Statement Write a program in C to convert the given string from lower case to upper case. ...

How to decode a base64 string in C#?

Here's a sample code snippet demonstrating how you can easily decode a base64 encoded string in C#. ...

How to disable editing of items in a combo box in c#?

When working in Win forms using C# and especially when you use the combo box , you would have notice...