C program to find the sum of digits in a number using recursion

Learn about C program to find the sum of digits in a number using recursion in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

Contents

C program to find the sum of digits in a number using recursion

Program:

#include<stdio.h>

int sum = 0; 

int digitalSum(int n)
{
   if(n!=0)
   {
     sum = sum + (n%10); 
     digitalSum(n/10);
   }
   return sum;
}

int main()
{
   int n;
   printf("Enter an integer number: ");
   scanf("%d",&n);
   printf("Sum of digits of %d is = %d", n, digitalSum(n) );
   return 0;
}

Output:

Enter an integer number: 345
Sum of digits of 345 is = 12

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