Sum_of_digits_using_recursion.c

#include <stdio.h>
int sum_of_digit(int n){
   if(n ==0)
	   return 0;
   return(n%10 + sum_of_digit(n/10));
   }

int main() {
	int num;
	printf("Enter a number:\n");
	scanf("%d", &num);
	int result = sum_of_digit(num);
	printf("the sum of digits in %d is %d",num, result);
	return 0;
}