Introduction
I have used Code::blocks 12 compiler for debugging purpose. But you can use any C programming language compiler as per your availability.
Write C program to find sum of natural numbers in given range using recursion
#include <stdio.h>
// Function declaration
int sumofnnumbers(int start, int end);
int main()
{
int start, end, sum;
// Inputting lower and upper limit from user
printf("Enter lower limit: ");
scanf("%d", &start);
printf("Enter upper limit: ");
scanf("%d", &end);
sum = sumofnnumbers(start, end);
printf("Sum of natural numbers from %d to %d : %d", start, end, sum);
return 0;
}
//Recursively find the sum of natural number
int sumofnnumbers(int start, int end)
{
if(start == end)
return start;
else
return start + sumofnnumbers(start + 1, end);
}
Result
