sum_n_natural_recursive.c

/******************************************************************************
Name:           Dhruba Saha
Roll No:        B.Sc(Sem-IV)-04
Program No:     7
Program Name:   Write a C program to sum of N natural number using  recursion
Date:           28/03/2022
*********************************************************************************/

#include <stdio.h>
#include <stdlib.h>

int sum();

void main() {
  int n;
  printf("Enter the number of natural numbers:\n");
  scanf("%d", &n);
  printf("The sum of natural numbers = %d\n", sum(n));
}

int sum(int n) {
  if (n == 0)
    return 0;
  else
    return n + sum(n - 1);
}