C Program to find the Sum of natural numbers

Published on December 25, 2016 by abundantcode

Filed under C

Last modified December 25, 2016

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Problem

Write a program in C to find the sum of natural numbers using recursive function.

How to find the sum of natural numbers using recursion in C ?

#include <stdio.h>
int Sum(int n);
int main()
{
    int input;
    printf("Abundantcode.com Coding samples\n");
    printf("Enter the limit : ");
    scanf("%d", &input);
    printf("Result = %d",Sum(input));
    return 0;
}

int Sum(int input)
{
    if(input != 0)
        return input + Sum(input-1);
    else
        return input;
}

Output

Abundantcode.com Coding samples

Enter the limit : 5

Result = 15

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